Omega HHWT-14 User guide

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Page 1

User’s Guide

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HHWT-14

Handheld Photometer for Lead,

Mercury, and Cadmium testing

Page 2

OMEGAnet®Online Service Internet e-mail

U.S.A.:

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For immediate technical or application assistance:

U.S.A. and Canada:

Mexico/ Latin America:

Benelux

Czech Republic:

France:

Germany/Austria:

United Kingdom:

ISO 9001 Certified

: Managed by the United Kingdom Office

omega.com [email protected]

Servicing North America:

Omega Engineering, Inc., One Omega Drive, P.O. Box 4047 Stamford, CT 06907-0047 USA Toll Free: 1-800-826-6342 TEL: (203) 359-1660 FAX: (203) 359-7700 e-mail: [email protected]

976 Bergar Laval (Quebec), H7L 5A1 Canada Toll-Free: 1-800-826-6342 TEL: (514) 856-6928 FAX: (514) 856-6886 e-mail: [email protected]

Sales Service: 1-800-826-6342/1-800-TC-OMEGA Customer Service: 1-800-622-2378/1-800-622-BEST Engineering Service: 1-800-872-9436/1-800-USA-WHEN

En Español: 001 (203) 359-7803 FAX: 001 (203) 359-7807 [email protected] e-mail: [email protected]

Servicing Europe:

Toll-Free: 0800 099 3344 TEL: +31 20 347 21 21 FAX: +31 20 643 46 43 e-mail: [email protected]

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Managed by the United Kingdom Office Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00 FAX: +33 (0) 130 57 54 27 e-mail: [email protected]

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OMEGA Engineering Ltd. One Omega Drive, River Bend Technology Centre, Northbank Irlam, Manchester M44 5BD United Kingdom Toll-Free: 0800-488-488 TEL: +44 (0) 161 777-6611 FAX: +44 (0) 161 777-6622 e-mail: [email protected]

It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, human applications.

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HHWT-14

Advanced Photometer System

Ideal for Screening for Lead, Mercury,

and Cadmium in Potable Water

(For Lead Soil Testing, see page 17)

For Your Safety:

Please read the entire manual before using the test kit.

Parameter Page MENU Lead in Water 5 PB2 Mercury in Water 6 HG3 Cadmium in Water 7 CD4

Kit Speciﬁcations 4 Spiked Recovery Method 8 Tips for Best Accuracy 9 Instrument Operation 10 Meter Error Messages 11 Battery Installation 11 Lead Recovery Samples 12 Summary of Chemistry 13 Lead Test Interferences 14 MSDS Sheets 15-16 Lead in Soil Method 17 HHWT-14 Accuracy 18

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HHWT-14 Photometer

HHWT-14 Meter Speciﬁcations

Measurement Method: Photometric Light Source: Light Emitting Diode (LED) Wavelength: 476 nm ABS Range: .001 - 2.00 Photometric Precision: .001 Automatic Range Selection: See Speciﬁcations below Display: 3-digit customized liquid crystal display

with annunciators CELL Pathlength: 20mm

ITEM PICTURED

LETTER

A B C D E

F G H

COMPONENT

NAME

Mixing Cap

Cell (Built-in Plastic, 4mL)

LCD Display

READ Button

MENU Button

ZERO/ON Button

Battery Cover with loop for lanyard

AAA Batteries (x4) (INCLUDED)

–

Cell Chamber: Custom-molded, proprietary, PET plastic

fused into chamber, non-removable

Sample Required: 4mL (0.13 oz) Operating Temperature Range: Power Supply: (4) AAA alkaline batteries (Included) Battery Life: 2000 tests with alkaline batteries Electromagnetic Compliance: (EMC) Immunity to Interference - EN 61326 Waterproof Rating: Exceeds IP67 Weight: Instrument: 140 g (5 oz) Dimensions: Instrument: 5 (W) x 3.5 (D) x 16.5 (H) cm;

(2 x 1.4 x 6.375 in)

0 - 50°C (32° - 122°F)

Emitted Interference - EN 61326

HHWT-14 has been designed to offer the user a more “Green” and cost-effective alternative to testing.

We offer a “Green” Alternative

Instead of using a 10mL water sample, HHWT-14 uses a 4mL water sample, which uses up to 60% less chemical per test. The accuracy of the meter is maintained by designing the photo cell with a 20mm pathlength.

HHWT-14 Speciﬁcations

Menu Tests for Range Resolution +/- Accuracy Limit*

PA1 Diluted Homogenized .000 to 1.99 .001 .003 or 6% — Paint Lead PB2 Lead in Water (auto-zero) 1 - 500 µg/L 1 µg/L 3 µg/L or 6% 3 µg/L HG3 Mercury in Water

CD4 Cadmium in Water

AB5 Future or Custom Tests .000 - 1.99 .001 .002 or 2% — (Absorbance) abs abs abs PB6 Lead in Water 1 - 500 µg/L 1 µg/L 3 µg/L or 6% 3 µg/L

PB2

Modiﬁed Test for Lead in Soil

200 - 300,000 200 + - 40% 200

*Limit is deﬁned as the minimum reliable detection for that test. Any value below the limit should be considered inconclusive for that metal’s presence.

(auto-zero)

10 - 600 µg/L 1 µg/L 6 µg/L or 6% 10 µg/L

0.01 - 0.80 mg/L .01 mg/L .06 mg/L or 6% .02 mg/L

18 - 3000 mg/kg 1 mg/kg + - 25% 18 mg/kg

mg/kg

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PB2

Lead in Water Test Procedure

Uses Reagent Set HHWT-486901.

PREPARE SAMPLE FOR TESTING

Collect water sample in 50mL conical tube to the 50mL line. Add three (3) drops of PB-ACID Reagent HHWT-486999B. Mix and allow to sit for at least ﬁve (5) minutes. After this time, TEST SAMPLE is ready for testing. NOTE: If sample is tap water or is acidic,

add 2 drops of PB-ACID.

TURN METER ON

Press the ZERO/ON button to power the meter on; the display will show all annunciators, then the current MENU selection, followed by the last reading.

SELECT TEST: PB2

Press and re-press the MENU button until the display shows the parameter PB2.

ADD SAMPLE TO CELL

Using the TEST SAMPLE from above, ﬁll and empty the CELL four (4) times. Finally, ﬁll cell to capacity (4mL) with the TEST SAMPLE. Tilt meter forward to allow excess sample to ﬂow out in order to make room for Pb-2 Reagent addition below.

ADD REAGENT Pb-2

Add ﬁve (5) drops of

Reagent Pb-2 HHWT-488375B

DIP STRIP AND PRESS “READ”

Dip the Pb-3 HHWT-486997 strip into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion.

strip after “1” on the display disappears*.

will ﬂash (- - -) and begin immediately counting up from 1 to 60. After the 60 seconds, the meter automatically zeros. The cursor will move across the display followed by 0 µg (µg/L).

Remove and discard the

The display

DIP STRIP AND PRESS “READ”

Dip the Pb-4 HHWT-486995 strip into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion.

*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.

NOTE: For best results, the ﬁnal pH of the sample should be between 9.5 and 10.

strip after “1” on the display disappears*.

will ﬂash (- - -) and begin immediately counting up from 1 to 60. After the 60 seconds, the cursor will move across the display, informing you that it is about to measure the sample as µg (µg/L). Record result displayed (this result is automatically stored in PB2). After testing, discard sample and rinse cell at least three times with clean water.

Remove and discard the

The display

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Mercury in Water Test Procedure

*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.

Uses Reagent Set HHWT-486901.

PREPARE SAMPLE FOR TESTING

TURN METER ON

Press the ZERO/ON button to power the meter on; the display will show all annunciators, then the current MENU selection, followed by the last reading.

SELECT TEST: HG3

Press and re-press the MENU button until the display shows the parameter HG3.

ADD SAMPLE TO CELL

ADD REAGENT Pb-2

Add ﬁve (5) drops of

DIP STRIP AND PRESS “READ”

Dip the Pb-3 HHWT-486997 strip into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion.

strip after “1” on the display disappears*.

will ﬂash (- - -) and begin immediately counting up from 1 to 60. After the 60 seconds, the meter automatically zeros. The cursor will move across the display followed by 0 µg (µg/L).

DIP STRIP AND PRESS “READ”

Dip the Pb-4 HHWT-486995 strip into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion.

strip after “1” on the display disappears*.

will ﬂash (- - -) and begin immediately counting up from 1 to 60. After the 60 seconds, the cursor will move across the display, informing you that it is about to measure the sample as µg (µg/L). Record result displayed (this result is automatically stored in HG3). After testing, discard sample and rinse cell at least three times with clean water.

Reagent Pb-2 HHWT-488375B

Remove and discard the

The display

Remove and discard the

The display

HG3

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CD4

Cadmium in Water Test Procedure

Uses Reagent Set HHWT-486904.

PREPARE SAMPLE FOR TESTING

Collect water sample in 50mL conical tube to the 50mL line. Add ﬁve (5) drops of HCl-1 Reagent HHWT-486994. Mix and allow to sit for ﬁve (5) minutes. After 5 minute wait, TEST SAMPLE is ready for testing.

TURN METER ON

Press the ZERO/ON button to power the meter on; the display will show all annunciators, then the current MENU selection, followed by the last reading.

SELECT TEST: CD4

Press and re-press the MENU button until the display shows the parameter CD4.

ADD SAMPLE TO CELL

Rinse the CELL at least 3 times with the TEST SAMPLE above. Finally, ﬁll cell to capacity (4mL) with the TEST SAMPLE. Tilt meter forward to allow excess sample to ﬂow out in order to make room for Pb-2 Reagent addition below.

ADD REAGENT Pb-2

Add ﬁve (5) drops of

DIP STRIP AND PRESS “READ”

Dip the Pb-3 HHWT-486996 strip into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion.

strip after “1” on the display disappears*.

will ﬂash (- - -) and begin immediately counting up from 1 to 240. After the 240 seconds, the meter automatically zeros. The cursor will move across the display followed by 0.00 mg (mg/L).

DIP STRIP AND PRESS “READ”

Dip the Pb-4 HHWT-486995 strip into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion.

strip after “1” on the display disappears*.

will ﬂash (- - -) and begin immediately counting up from 1 to 240. After the 240 seconds, the cursor will move across the display, informing you that it is about to measure the sample as mg (mg/L). Record result displayed (this result is automatically stored in CD4). After testing discard sample and rinse cell immediately.

Reagent Pb-2 HHWT-488375B

Remove and discard the

The display

*NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.

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Spiked Recovery Test Method for Interferences:

The Spiked Recovery Test Method (also referred to as Standard Additions Method) is used to verify that HHWT-14 gives accurate results for your water sample. If you ﬁnd an unexplained difference in results when compared to another test method it is reasonable that you should resolve the issue. A good way to resolve the issue is by a technique commonly used by analytical chemists every day. This technique is often referred to as Spiked Recovery Test Method for Interferences. The following information explains how to perform the test method. You will need a Lead standard solution. The idea behind this method is as follows:

1. Add a known amount or concentration of Lead standard solution to the questionable sample. This is now the “spiked sample.” It is recommended to add a Standard Solution amount that is at least equivalent to three times the minimum detectable limit of the test (10 µg/L or ppb).

2. Test the spiked and un-spiked (original) samples using the same reagents, instrument and technique or test method. The spiked sample should show an increase equal to the amount of standard added. The value obtained is called the Recovery. Ideally the % recovery is 100%. Results are acceptable if the % recovery is +/- 10%. The formula for calculating percent Recovery is below.

3. If the percent recovery is not in the acceptable range there may be interferences. You can consider diluting the sample with lead free water past the point of interference, within the detection limit of the test kit. You can also consider calculating the actual lead in the sample (see below) as long as the % Recovery is above a reasonable level such as 40%.

The percent recovery formula is as follows:

% Recovery = 100(cs-cu) K

Where: cs = concentration found through testing of the spiked sample cu = concentration found through testing of the un-spiked sampl e (NOTE: result should be adjusted for the dilution of the spike volume if volume change is more then 5%) k = concentration of the spike added to the sample

Example 1: An un-spiked questionable sample measures 10 ppb Lead. A separate 10mL portion of the questionable sample was spiked by adding 20 µL of a 10 ppm Lead standard solution. This is the equivalent of adding 20 ppb Lead to the water sample. The spiked solution was measured by the same method as the original sample. The Spiked result was 28 ppb (Cs) cs = 28 ppb cu = 10 ppb k = 20 ppb

% Recovery = 100(28-10) = 90% (Recovery result acceptable) 20 Example 2: In another water sample using a similar spiked method as in Example 1 the results were cs = 30 ppb cu = 18 ppb k = 20 ppb

% Recovery = 100(30-18) = 60% (Recovery result unacceptable) 20

Calculating the Lead:

water sample gives lead results that are 60% of the actual concentration. To calculate the concentration of lead in this sample divide the expected recovery (100%) by the observed recovery (60%) to get the interference correction factor (100% / 60% = 1.67). Multiply the interference correction factor by the un-spiked sample result (cu) for the actual concentration of lead in the sample (1.67 x 18 ppb = 30 ppb).

In this example the percent recovery value is low and suggests that, with this test, the

Page 9

HHWT-14 Tips For Best Accuracy

Become familiar with the meter and the different tests by reading the instructions carefully.

Observe the dip time (as required for the test) for accurate results.

Be sure the CELL is ﬁlled to capacity (4mL). Then, tilt meter forward to discard about

0.2mL of the cell volume. This allows for the Pb-2 addition to be performed without overﬁlling the CELL.

Rinse the CELL with clean water immediately after completing the test. (Some test reagents will stain or coat the CELL)

It is recommended that the sample be allowed to sit for 5 minutes or longer in Step 1 to facilitate Acid reaction. Additional time would be recommended if the detection of solid Lead or Cadmium, containing particles, are of interest.

Store the meter and all test materials out of direct sunlight and away from chemical storage areas.

Minimize exposure of meter and test reagents to heat. Storage below 80°F (27°C) is recomended. DO NOT REFRIGERATE TEST REAGENTS.

Dry the outside of the meter when testing is complete or before storage of the meter.

Each strip is valid for ONLY one test. Discard strip after single use in regular trash that is inaccessible to children and pets.

10.

Each bottle of strips contains the quantity of strips notated on the bottle. Due to the manufacturing process, you may ﬁnd one or two strips that are noticeably smaller or larger in width than the normal strips in the bottle. These should be discarded. Using these strips may give unreliable results.

11.

If conversion table(s) are supplied, they have a unique revision number. It is recommended that you visit www.sensafe.com to check for any updated revisions and details.

12.

Tests are calibrated at 75°F +/- 2°F (24°C +/- 1°C). It is recommended that the water sample be warmed before testing if sample temperature is below 60°F / 16°C.

13.

Our lab testing with the HHWT-14 meter has shown that zeroing and measuring of the sample does not require any cell cover for accurate results, even in full sunlight.

14.

Remove batteries when meter is not used for more than a month.

15.

CELL cleaning procedure: Fill cell with clean water and add two drops of Acid-1 or HCl-1. Leave meter undisturbed for 5 minutes. Afterwards, rinse the cell and the meter is ready for use again. Cleaning the cell regularly will not be necessary if you rinse the CELL immediately after the test.

Lead in Water Recomendation for “First Draw Sample”

The EPA 2007 Lead and Copper Rule Revision has a heavy lead testing focus on schools. The sampling is tiered:

1. “First draw sample” - sample a line unused for at least 8 to 18 hours. Draw the ﬁrst 250mL to test. This measures the lead contribution from ﬁxtures.

2. “Flushed sample” - before any water is used in the morning allow the line to run for 30 seconds, and then collect a 250mL sample. This measures the lead contribution from internal piping

The June 1991 Lead and Copper Rule Fact Sheet recommended 1 liter of water from a tap unused for 6 hours. This is not mentioned in the 2007 revisions to the rule.

The amount of ﬂushing determines what part of the system is being evaluated for lead. If the volume of water in the system can be determined (e.g. gallons of water/linear ft. of pipe) the amount of ﬂushing can help isolate the source of the lead contamination. It appears that this approach is used by some cities as they do mandated lead testing of their water systems.

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Instrument Operation Summary

Key Functions

Key Description Function

ZERO/ON While meter is off, when pressed, this turns meter on.

When meter is on, when pressed, this zeros meter.

READ When pressed, this initiates countdown timing and

count up timing as appropriate for the MENU test.

MENU When pressed and re-pressed, this advances the

display to the next MENU test. When pressed and held down for two seconds (continue holding down), the instrument automatically retrieves the last 20 measurements in the MENU displayed. Beginning with the most recent measurement stored (20) through the oldest measurement stored (1). This recall is available for each MENU test.

Page 11

HHWT-14 Meter Messages

The following are some common messages that may be displayed, including error messages. If an error message other than those listed below is displayed, please contact technical support in the USA at (800) 872-9436.

LCD Message

Description

In READ mode: test sample concentration is above the measurement range (test speciﬁc). In READ mode: test sample concentration is below the measurement range (test speciﬁc). In ZERO mode: sample absorbance (due to a cloudy or colored sample or a dirty cell) is too high to zero, the meter will read “LO”. Excessive stray light detected. Normally this does not occur, even when testing in sunlight.

Low battery indication.

Corrective Action

Dilute and retest.

Sample value is below measurement range.

Dilute sample, ﬁlter sample, or clean cell. Testing cannot proceed until a valid ZERO is acheived. Place the LIGHT BLOCKING CAP over the CELL for zeroing and for reading result. Moving to a shaded area can also ﬁx this problem. Replace the batteries.

About The Built-In Cell

The built-in CELL is transparent plastic and, when ﬁlled to the top, contains 4mL. The sturdy CELL design will last for over 20,000 readings. Scratches on the CELL will not interfere or compromise the accuracy of the readings because of its ﬁxed position. For best accuracy, rinse cell with clean water immediately after a test is completed. Do not use solvents, such as acetone, to clean the cell. When the CELL becomes stained or cloudy from repeated testing, or when the meter does not blank when you press the ZERO/ON button, the cell needs to be cleaned.

To Install/Replace “AAA” Batteries:

1. Unscrew the O-ring sealed battery cover counter-clockwise. Use proper sized pliers if necessary. Do not disturb the sealing O-ring. Batteries are not included.

2. Remove the used batteries and install 4 new AAA batteries following the diagram for correct polarity (see diagram). We recommend high quality AAA alkaline batteries be used.

4. Replace the battery cover. Be sure to tighten the cover securely. This is necessary for meter to be waterproof.

5. Dispose of the used batteries in accordance with your local regulations.

6. Press ZERO/ON button to conﬁrm the meter turns on. The meter is now ready for operation.

7. Meter will not work if battery orientation is incorrect.

TOP VIEW

Page 12

Lead Recovery in Various Water Samples:

Our laboratory has performed numerous Spiked Recovery tests using water samples from around the world. The water samples were obtained in the locations as identiﬁed below. The water was collected in clean plastic bottles and shipped to our lab. The samples were not preserved by acid and not refrigerated.

Each sample was spiked in duplicate at two different spiked concentrations (20µg/L and 50µg/L) giving a total of four spiked tests. Except for two water samples the % recovery of spiked water samples had an acceptable average for the four spiked water tests (within +/- 10%). The Highland, NC well water averaged a 74% Recovery and the Seattle, WA municipal water averaged 83.5% Recovery.

Water sample lead (Pb as 0, except for Rock Hill, SC water (exposed to lead).

Water Spiked Spiked Water Sample 20ppb % 50ppb % Water Origin Type µg/L ppb (ug/L) Recovery ppb (ug/L) Recovery

Vienna, Austria M 0 21 105 52 104 repeated 0 19 95 51 102 Munich, Germany M 0 21 105 54 108 repeated 0 19 95 46 92 Kusnacht, Switzerland M 0 20 100 51 102 repeated 0 19 95 54 108 Paris, France M 0 19 95 50 100 repeated 0 20 100 45 90 Washington, DC M 0 23 119 52 104 repeated 0 20 100 49 98 Philadelphia, PA M 0 17 85 45 90 repeated 0 23 119 43 86 Phoenix, AZ M 0 20 100 47 94 repeated 0 21 105 47 94 Edgewater, MD W 0 22 110 50 100 repeated 0 16 80 46 92 Highland, NC W 0 15 75 36 72 repeated 0 15 75 37 74 Rockwell, NC W 0 22 110 51 102 repeated 0 23 119 50 100 Las Vegas, NV M 0 19 95 52 104 repeated 0 17 85 49 98 Chicago, IL M 0 21 105 51 102 repeated 0 16 80 52 104 Rock Hill, SC W 0 18 90 47 94 repeated 0 17 85 46 92 Melbourne, Australia M 0 20 100 47 94 repeated 0 19 95 45 90 Rock Hill, SC (exposed to lead) M 5 25 100 56 102 repeated 5 26 104 52 95 Weaverville, NC M 0 16 80 52 104 repeated 0 20 100 46 92 Anaheim, CA M 0 19 95 53 106 repeated 0 21 105 47 94 Seattle, WA M 0 16 80 45 90 repeated 0 16 80 42 84 Kilowna, BC, Canada M 0 19 95 51 102 repeated 0 21 105 53 106

*M = Municipal, W = Well

) concentrations found for all samples were below 3ppb, and reported

Page 13

Summary of HHWT-14 Chemistry for Lead (Pb+2) Detection:

Lead in the water sample is ﬁrst solubilized to Pb reagent. Pb-2 Buffer is then added to make the solution alkali. The Strip Pb-3 is dipped for 20 seconds with gentle motion, which adds the porphyrin indicator, and mixes the solution. After a one minute wait, which allows for the porphyrin and Pb+2 to form a colorimetric complex, the HHWT-14 Colorimeter automatically zeros. The Strip Pb-4 is dipped into the cell sample for twenty seconds with gentle motion. This motion releases EDTA into the sample which then breaks up the colorimetric porphyrin-Pb2+ complex. After a one minute wait, the result is displayed in µg (µg/L) as Lead. The Mercury test uses a similar chemistry. Cadmium uses Hydrochloric Acid for solubilization of the Cadmium ion, and this test requires more indicator reagent.

A procedure using the porphyrin 5,10,15,20-terakis(1-methylpyridinium-4-yl)porphine as indicator is described in Mirochim Acta volume 157, page 87-91 published in 2007 K. Kawamura, et al. For convenience the indicator is referred to as TMPYP. Our modiﬁed test procedure is patented. In combination with the Strip reagent delivery device, and by not removing the cell from the meter between the zeroing and reading steps; HHWT-14 delivers optimum accuracy and sensitivity. Please refer to the Lead Test Interference chart (Table 1) for details as to the highest concentration of ions the test can tolerate. From our lab and contract lab studies with HHWT-14 we ﬁnd that over 90% of the typical potable, municipally treated water samples experience no interference. Before you start using the HHWT-14 with potable water samples in your area use the “Standard Additions” method to determine if there are any interferences in your water that may require consideration.

Interfering ions listed, except for Mercury and Cadmium, inhibit the TMPYP-Pb+2 complex formation above the concentrations given. Mercury and Cadmium give similar color reaction with TMPYP. Mercury is rarely found in tap water above 0.005 mg/L. A procedure modiﬁcation is not yet available to remove Mercury interference. Typical Cadmium levels in tap water will not interfere in the Lead and Mercury procedures using Nitric Acid. Hardness ions such as Calcium and Magnesium are tolerated as noted in Table 1. When the water sample has Total Hardness minerals above 400 mg/L, the Pb-4 addition of EDTA may be inadaquate; and the TMPYP-Pb+2 complex may not be completely destroyed and the lead reading will be low. If you suspect this, do a Spiked Recovery Test (page 8).

by the addition of the Nitric Acid

It is recommended that for best results this test be done on unpreserved, freshly drawn water samples. Water samples that have been preserved with strong Nitric Acid for lead testing will require alkali neutralization of excess acid to a pH of about

2.5; and the Acid-1 addition can be skipped. After the Pb-2 addition step the pH should be veriﬁed if pH issue is a concern; and ideally should be between 9.5 and

10.0 pH.

Page 14

Table 1:

Lead Test (PB2 & PB6 MENU) Interferences

(Similar interferences can be expected for Mercury and Cadmium Tests.)

Ion

Aluminum, Al

Barium, Ba

Bromide, Br

Cadmium, Cd

Calcium, Ca

Chloride, Cl

Chromium, Cr

Cobalt, Co

Copper, Cu

Fluoride, F

Iron, Fe

Interference

Level

2 mg/L Magnesium, Mg

3 mg/L Manganese, Mn

20 mg/L

0.07 mg/L Nickel, Ni

Mercury, Hg

500 mg/L Nitrogen, Ammonium, NH

150 mg/L Nitrogen, Nitrate, NO

0.1 mg/L

1 mg/L

Nitrogen, Nitrite, NO

Phosphate, PO

5 mg/L Sulfate, SO

40 mg/L

0.2 mg/L

Tin, Sn

Zinc, Zn

Ion

0.1 mg/L

Interference

Level

200 mg/L

0.5 mg/L

0.01 mg/L

1 mg/L

40 mg/L

20 mg/L

300mg/L

100 mg/L

200 mg/L

0.2 mg/L

2 mg/LIron, Fe

Rev. 07/03/07

About your Water Sample:

If the water sample you are testing has a pH of 6.5 to 8.5, then the HHWT-14 Reagent System will give valid results. If your water sample is below pH 6.5 or above pH 8.5, or has a Total Alkalinity above 200 PPM; then the pH of the water needs to be adjusted to between pH 7 and 8 before testing begins. Use 1.0N HCl or 1.0N NaOH to adjust the pH of your water sample. Iron above 0.1 ppm can be present in well water samples. It is recommended that the absence of iron be conﬁrmed by the Iron Check Test (HHWT-

480025). If your results are different from what you expect, then after the test is completed, check the pH of the reacted sample. The chemistry, to work properly, should have a ﬁnal pH of 9.5 to 10.0. If your pH is below 9.5, then add six drops of PB-2 in step 5. If pH is above 10.0, then add four drops of PB-2 in step 5.

Speciﬁcations:

The test detects from 0 to 500 µg/L or ppb levels of Lead as Pb2+. The most accurate test range will be 3 to 200 µg/L. For this range, the Test resolution is 1 ppb, minimum detection is 3 µg/L, and accuracy is +/-3 µg/L or +/-6% (whichever is higher), when used with an HHWT-14 Photometer. If lead level is above 500 µg/L (ppb), dilute sample with lead-free water before retesting.

The MCL (Maximum Contaminant Levels allowed) for drinking water as set by the USEPA for Pb2+ is 15 µg/L (WHO is 10 µg/L); Mercury (Hg+2) is 2 µg/L; and Cadmium (Cd+2) is 5µg/L.

Page 15

MSDS 1

Material Safety Data Sheet

Section 1 Chemical Identiﬁcation

Catalog # / Description: Part Number HHWT-486999B Name: Reagent PB-Acid (17mL)

Section 2 Composition / Information on Ingredients

CAS #:7697-37-2 Nitric Acid 18% CAS#: 7732-18-5 Demineralized Water 82%

Caution: CORROSIVE ingredient

Section 3 Hazards Identiﬁcation

Clear colorless liquid causes BURNS: Eye contact: Causes eye burn Skin Contact : Causes burn Ingestion: Can cause acid burn including nausea, abdominal pain. Wear safety glasses with top and side shields and latex gloves when handling. Irritating to nose and throat. Avoid inhalation. Remove and wash contaminated clothing before reuse.

Section 4 First-Aid Measures

• If swallowed, give 1-2 glasses of water. Call a physician or the Poison Control Center as a precaution.

least 2 minutes. Remove contaminated clothing and shoes.

at least 15 minutes. Call physician.

seek medical advice.

Section 5 Fire Fighting Measures

Not Flammable, but reacts with many metals forming hydrogen gas,

appropriate for surrounding ﬁre conditions.

Section 6 Exposure Controls / Personal Protection

Have an eyewash station nearby. Do not expose to eyes, skin, or clothing. Keep away from children and pets. Wash hands thoroughly after handling. Maintain general hygienic practices when using this product.

Section 7 Physical and Chemical Properties

Appearance and Odor:

• Clear, colorless liquid with no odor

Physical Properties:

• Melting Point: Not Applicable

• Vapor Pressure: Not Applicable

• Vapor Density: Not Available

• pH: < 0.6

• Stable when stored at room temperature.

Hazardous Polymerization:

• Will not occur.

Section 8 Toxicological Information

• Ingredient toxicological data:

• Nitric acid oral Human LDLo=430mg/kg

• Each bottle contains about 17mL liquid

Wash hands after use and avoid skin, eye contact.

• This product may be shipped as part of a chemical test kit composed

of various compatible components because of it’s small volume.

Section 9 Other Information

The above information is believed to be correct but does not purport to be all-inclusive and shall be used ONLY as a guide. Keep away from children and pets.

about 1.2

MSDS 2

Material Safety Data Sheet

Section 1 Chemical Identiﬁcation

Catalog # / Description: Part Number HHWT-488375B Name: Reagent Pb-2 (15mL)

Section 2 Composition / Information on Ingredients

CAS#: 115-69-5 2-Amino-2-Methyl-1,3-Propanediol (AMP) 7% CAS# 77-86-1 Tris(hydroxymethyl)-aminomethane (TRIS) 15% CAS# 7732-18-5 Demineralized water 78%

Section 3 Hazards Identiﬁcation

• Physical Appearance: Clear, colorless liquid

• Immediate Concerns: DANGER. Alkali pH of around 10.8. Causes

skin and eye burns. Wear safety glasses with top and side shields and latex gloves when handling. Irritating to nose and throat. Avoid inhalation. Remove and wash contaminated clothing before reuse.

Section 4 First-Aid Measures

for 15 minutes. Call Physician.

with soap and plenty of water. If skin irritation develops, seek medical attention. INGESTION: If swallowed: Give 1-2 glasses of water. Do not induce vomiting. Never give anything by mouth to an unconscious person. Call a physician immediately.

Section 5 Fire Fighting Measures

conditions

Section 6 Exposure Controls / Personal Protection

Do not expose to eyes, skin, or clothing. Keep away from children and pets. Wash hands thoroughly after handling. Maintain general hygienic practices when using this product.

Section 7 Physical and Chemical Properties

Appearance and Odor:

• Clear liquid.

• Odorless

Physical Properties:

• Melting Point: Not Applicable

• Vapor Pressure: Not Volatile

• Vapor Density: Not determined

Stability:

• Stable when stored under proper conditions.

Hazardous Polymerization:

• Will not occur.

Incompatibilities:

• Incompatible with strong acids.

Section 8 Toxicological Information

Acute Effects of ingredients:

• TRIS Oral LD50: 5,900 mg/kg (rat)

• AMP Oral LD50: 17,000 mg/kg (rats)

Section 9 Other Information

The above information is believed to be correct but does not purport to be all-inclusive and shall be used ONLY as a guide. Keep away from children and pets.

about 1.4

Page 16

MSDS 3

Material Safety Data Sheet

Section 1 Chemical Identiﬁcation

Catalog # / Description: Part Number HHWT-486997 Name: Strip Pb-3 (50)

Section 2 Composition / Information on Ingredients

CAS #: 36951-72-1 Chemical: meso-Tetra(N-methyl-4-pyridyl)prophine tetratosylate salt Trade name: TMPYP

• Purple powder, Brown appearance on strip pad

Section 3 Hazards Identiﬁcation

Precautionary Statements: May be harmful by inhalation, ingestion and skin absorption. Causes eye and skin irritation.

Section 4 First-Aid Measures

physician.

seek medical advice.

• In case of contact, immediately wash skin with soap and water

thoroughly.

Section 5 Fire Fighting Measures

Fire/Explosion Hazard:

• Fire may produce irritating or poisonous gases in small quantity

Extinguishing Media:

• Foam and water, Carbon Dioxide or dry chemical.

Section 6 Exposure Controls / Personal Protection

Do not get in eyes, on skin, on clothing. Keep away from children and pets. Wash hands thoroughly after handling. Maintain general hygienic practices when using this product.

Section 7 Physical and Chemical Properties

Appearance and Odor:

• Solid bluish-gray powder

Physical Properties:

• Melting Point: >400°C

• Vapor Pressure: Not Applicable

• Vapor Density: Not Applicable

Stability

• Stable when stored dried and at room temperature.

Hazardous Polymerization:

• Will not occur.

Section 8 Toxicological Information

• Skin and eye irritation.

• LD50: None reported

Section 9 Other Information

The above information is believed to be correct but does not purport to be all-inclusive and shall be used ONLY as a guide. Dispose of empty bottle and used test strip as normal trash. Keep away from children and pets. Store in a dry, cool place. Keep container tightly closed.

1.98

MSDS 4

Material Safety Data Sheet

Section 1 Chemical Identiﬁcation

Catalog # / Description: Part Number HHWT-486995 Name: Strip Pb-4 (50)

Section 2 Composition / Information on Ingredients

CAS#: 64-02-8 Chemical: EDTA Tetrasodium salt impregnated on strip pad pH adjusted to 10.5

Section 3 Hazards Identiﬁcation

Precautionary Statements:

• May be irritating to eyes and nasal passages.

• Low toxicity orally due to small amount in test pad

• LD50: None reported.

Section 4 First-Aid Measures

• If swallowed, give large quantities of water and call a physician or the

Poison Control Center as a precaution.

at least 15 minutes. Call physician.

Section 5 Fire Fighting Measures

Not Applicable since the amount of Reagent in pad and kit is negligible.

Section 6 Exposure Controls / Personal Protection

Do not expose to eyes, skin, or clothing. Keep away from children and pets. Wash hands thoroughly after handling. Maintain general hygienic practices when using this product.

Section 7 Physical and Chemical Properties

Appearance and Odor:

• White powder. Soluble in water.

Physical Properties:

• Melting Point: >300°C

• Vapor Pressure: Not Applicable

• Vapor Density: Not Applicable

Stability

• Stable when stored under proper conditions.

Hazardous Polymerization:

• Will not occur.

Incompatibilities:

• None reported.

Section 8 Toxicological Information:

• LD50: None reported

Section 9 Other Information

The above information is believed to be correct but does not purport to be all-inclusive and shall be used ONLY as a guide. Keep away from children and pets. Store in a dry, cool place. Keep container tightly closed.

Not Applicable

Page 17

HHWT-14 Method for Lead in Soil:

Uses Reagent Set HHWT-486902.

Extraction Method Add one level scoop (0.1mL volume scoop, which holds approximately 0.14

grams) of soil sample to a clean 50mL, graduated, plastic conical tube. Add Twenty (20) drops of Pb-1P HHWT-487925-P15 to the conical tube. Swirl the mixture for a few seconds or until all soil is suspended and mixed well. After ﬁve minutes, bring the volume of the sample to 50mL using deionized, distilled, or lead free tap water. Cap and mix this solution. This solution is now identiﬁed as the Soil Extraction Solution (SES). Wait one (1) minute, or more, for suspended solids to settle, then perform the test as follows:

Add 1.0mL (1000 µl) of SES sample to a clean 50mL conical tube. Do not add Pb-1P

HHWT-487925-P15 to the conical tube. Adjust the volume of the cell to 50mL using lead free tap water. Mix sample. Test Sample is ready for testing. Press the ZERO/ON button to power the meter on; the display will show all annunciators,

then the current MENU selection, followed by the last reading.

Press and re-press the MENU button until the display shows the parameter PB2.

(Pb-1P, 0.1mL scoop, and 50mL Plastic Conical tube are not supplied, but required to perform this test)

Rinse the CELL at least 3 times with the Test Sample above. Finally, ﬁll cell to capacity (4mL)

with the Test Sample. Tilt meter forward to allow excess sample to ﬂow out in order to make room for Pb-2 Reagent addition below.

Add ﬁve (5) drops of Reagent Pb-2 HHWT-488375B.

Dip the Pb-3 HHWT-486997 strip into the CELL and immediately press READ. This starts the

20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion. Remove and discard the strip after “1” on the display disappears. The display will ﬂash (- - -) and begin immediately counting up from 1 to 60. After the 60 seconds, the meter automatically zeros. The cursor will move across the display followed by 0 µg (µg/L).

Dip the Pb-4 HHWT-486995 strip into the CELL and immediately press READ. This starts the

20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion. Remove and discard the strip after “1” on the display disappears. The display will ﬂash (- - -) and begin immediately counting up from 1 to 60. After the 60 seconds, the cursor will move across the display, informing you that it is about to measure the sample as µg (µg/L). Record result displayed (this result is automatically stored in PB2). After testing is complete discard sample and rinse cell immediately.

To convert the value in step 7 from µg/L to mg/kg use 17.86 as the multiplication factor:

(For example: 65 µg/L NOTE: If no Lead is found when 1.0mL SES sample is used in Step 1, then try 2mL of the

SES for lower detection. If the result reads “HI”, then the SES sample should be retested using a 0.01mL sample in Step 1. Pb-1P and Pb-2 drops required for these SES volume variations are listed in the chart below.

× 17.86 = 1161 mg/kg)

SES

Volume

0.01mL 1mL 2mL

Pb-1P Drops

0 0 0

Pb-2

Drops

5 5 5

Multiplication

Factor

1786

17.86

8.93

Range

(mg/Kg)

up to 300,000

18 to 3000 18 to 1500

Accuracy

(%) ± 40 ± 25 ± 25

Page 18

HHWT-14 Accuracy

Hach® Lead Standard Solution, 10 mg/L as Pb+2 (Cat. 23748-20) was veriﬁed by Atomic Absorption and used with the HHWT-14 Meter, PB2 MENU to conﬁrm precision and accuracy.

Hach

AAS, Lead

Std, ppb

The Hach Company and all other Hach products trademarks, service marks, trade names, logos, domain names, URLs and icons (“Marks”) appearing on this manual, registered or not, are the property of Hach Company Inc., Loveland, CO.

Meter 1

PB2 MENU

0 5

10.7 14 20 60

107 214 321 428 438

ppb

110 209 322

0 4 6

6 10 18 63

Meter 2

PB2 MENU

ppb

4 10 10 10 20 67

110 221 331 451

Average

PB2 MENU

ppb

0 4 8

8 10 19 65

110 215

326.5

444.5

450

Detection of Lead in Water

400

350

300

250

200

150

HHWT-14 PB2 MENU, ppb

100

0 50 100 150 200 250 300 350 400 450

y = 1.0335x - 1.7741

= 0.9996

Hach

Lead Standard, ppb (AAS measured)

Page 19

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRAN including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear i limited to contact points, fuses, and triacs.

OMEGA is pleased to offer s uggestions on the use o f its various products. H owever, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for conse

quential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchase OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner.

TY does not apply to defects resulting from any action of the purchaser,

s not warranted, include

IMPLIED, EXCEPT THAT OF

not intended to be used, nor shall it be used: (1) as a “Basic

but are not

r will indemnify

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM O M EGA’ S CUSTOMER S ERVICE D EPART MEN T ( IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY following information available BEFORE contacting OMEGA:

1. Purchase Order number under which the product was PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering.

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

RETURNS, please have the

FOR NON-WARRANTY REPAIRS,

for current repair charges. Have the following information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems relative to the product.

consult OMEGA

Page 20

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

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M-5101/1212