59571-88
POCKET COLORIMETER™ II
ANALYSIS SYSTEMS
INSTRUCTION MANUAL
Bromine (Br)
Chlorine Dioxide (ClO
2
)
Chlorine (Cl
2
) / pH
© Hach Company, 2004–2006. All rights reserved. Printed in the U.S.A. te/dk 9/06 4ed
1—2
Important Note
This manual is intended for use with the following Pocket Colorimet er™ II
instruments:
The Pocket Colorimeter™ II instruments listed above are not interchangeable.
Bromine Cat. No. 59530-01
Chlorine Dioxide Cat. No. 59530-51
Chlorine / pH Cat. No. 59530-12
1—3
Table of Contents
Safety Precautions............................................................................................... 1—7
Laboratory Safety............................................................................................... 1—7
Use of Hazard Information................................................................................ 1—7
Precautionary Labels........ ....... ....... ....................................................................1— 8
Specifications......................................................................................................... 1—9
Instrument Keys and Display...........................................................................1—11
Instrument Cap Cord.........................................................................................1—12
Bromine, Total, LR..............................................................................................1—15
Measuring Hints ...............................................................................................1—15
Sampling and Storage......................................................................................1—22
Accuracy Check................ ....... .............................................................. ...........1—22
Interferences......................................................................................................1—24
Method Performance........................................................................................1—26
Bromine, Total, HR.............................................................................................1—27
Measuring Hints ...............................................................................................1—27
Sampling and Storage......................................................................................1—31
Accuracy Check................ ....... .............................................................. ...........1—31
Interferences......................................................................................................1—33
1—4
Table of Contents, continued
Method Performance........................................................................................1—35
Summary of Method.........................................................................................1—35
Replacement Parts (LR and HR)......................................................................1—35
Chlorine, Free and Total, HR..........................................................................1—39
Measuring Hints................................................................................................1—39
Accuracy Check............................................. ....................................................1—44
Interferences......................................................................................................1—46
Spec
√ Secondary Standards............................................................................1—49
Method Performance........................................................................................1—49
Summary of Method.........................................................................................1—49
Replacement Parts.............................................................................................1—50
Chlorine Dioxide..................................................................................................1—53
Measuring Hints................................................................................................1—53
Sampling and Storage......................................................................................1—61
Accuracy Check............................................. ....................................................1—61
Method Performance........................................................................................1—64
Interferences......................................................................................................1—64
Summary of Method.........................................................................................1—66
Reagents and Apparatus................................................................ ....... ...........1—6 6
1—5
Table of Contents, continued
pH..............................................................................................................................1—69
Measuring Hints ...............................................................................................1—69
Accuracy Check................ ....... .............................................................. ...........1—74
Method Performance........................................................................................1—74
Standard Calibration Adjust ...........................................................................1—75
Summary of Method........................................................................................1—75
Replacement Parts............................................................................................1—76
Instrument Operation.........................................................................................2—3
Key Functions..................................................................................................... 2—3
Menu Selections.............................. ....................................................................2— 4
Switching Ranges............................................................................................... 2—4
Setting the Time ................................................................................................. 2—4
Recalling Stored Measurements........................................................................ 2—5
Battery Installation............................................................................................. 2—6
Error Codes.............................................................................................................. 2—9
Error Messages.................................................................................................... 2—9
Standard Calibration Adjust..........................................................................2—13
1—6
Table of Contents, continued
User-Entered Calibration.................................................................................2—15
Overview............................................................................................................2—15
Calibration Procedure Using Prepared Standards.........................................2—17
Entering a Predetermined Calibration Curve.......... .......................................2—20
Editing a User-entered or Factory Calibration Curve...................................2—22
Exiting the Calibration Routine......................... .............................................2—24
Deleting Calibration Points.......................... ....... ...... .......................................2—24
Retrieving the Factory Calibration ............................................... ..................2 —25
Maximum/Minimum Displayed Value....................................................... ....2—26
Certification..........................................................................................................2—28
How to Order........................................................................................................2—35
Repair Service.......................................................................................................2—37
Warranty.................................................................................................................2—38
1—7
Safety Precautions
Please read this entire manual before unpacking, setting up, or operating this
instrument. Pay particular attention to all danger and caution statements. Failure
to do so could result in serious injury to the operator or damage to the equipment.
To ensure the protection provided by this equipment is not impaired, do not use or
install this equipment in any manner other than that which is specified in
this manual.
Laboratory Safety
As part of good laboratory practice, pl eas e familiarize yourself with the reagents
used in these procedures. Read all product labels and the m aterial safety data
sheets (MSDS) before using them. It is always good practice to wear safety glasses
when handling chemicals. Foll ow instructions carefully. Rinse thoroughly if
contact occurs. If you have questions about reagents or procedures, please contact
the manufacturer or distributor.
Use of Hazard Information
If multiple hazards exist, this manu al wi ll use th e sign al wo rd (Danger, Caution,
Note) corresponding to the greatest hazard.
1—8
Safety Precautions, continued
DANGER
Indicates a potentially or imminently hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or
moderate injury.
NOTE
Information that requires special emphasis.
Precautionary Labels
Please pay particular attention to labels and tags attached to the instrument.
Personal injury or damage to the instrument could occur if not observed.
This symbol, if noted on the instrume n t, referen ces the instruct io n manual
for operational and/or safety inform ation.
1—9
Specifications
Lamp: Light emitting diode (LED)
Detector: Silicon photodiode
Photometric precision: ± 0.0015 Abs
Filter bandwidth: 15 nm
Wavelength: 528 nm
Absorbance range: 0–2.5 Abs
Dimensions: 3.2 x 6.1 x 15.2 cm (1.25 x 2.4 x 6 inches)
Weight: 0.2 kg (0.43 lb)
Sample cells: 25 mm (10 mL), 1 cm (10 mL), AccuVac
®
Ampuls
Operating conditions: 0 to 50 °C (32 to 122 °F); 0 to 90% relative humidity
(noncondensing)
Power supply: Four AAA alkaline batteries; approximate life is 2000 tests*
* Backlight usage will decrease battery life.
1—10
OPERATION
DANGER
Handling chemical samples, standards, and reagents can be dangerous. Review the necessary
Material Safety Data Sheets and become familiar with all safety procedures before handling
any chemicals.
DANGER
La manipulation des échantillons chimiques, étalons et réactifs peut être danger euse. Lir e les Fiches
de Données de Sécurité des Produits (FDSP) et se familiariser avec toutes les procédures de sécurité
avant de manipuler tous les produits chimiques.
PELIGRO
La manipulación de muestras químicas, estándares y reactivos puede ser peligro s a. Revi se las fichas
de seguridad de materiales y familiarícese con los procedimientos de seguridad antes de manipular
productos químicos.
GEFAHR
Das Arbeiten mit chemischen Proben, Standards und Reagenzien ist mit Gefahren verbunden. Es
wird dem Benutzer dieser Produkte empfohlen, sich vor der Arbeit mit sicheren Verfahrensweisen
und dem richtigen Gebrauch der Chemikalien vertraut zu machen und alle entsprechenden
Materialsicherheitsdatenblätter aufmerksam zu lesen.
PERIGO
A manipulação de amostras, padrões e reagentes químicos pode ser perigosa. Reveja a folha dos
dados de segurança do material e familiarize-se com todos os procedimentos de segurança antes
de manipular quaisquer produtos químicos.
PERICOLO
La manipolazione di campioni, standard e reattivi chimici può essere pericolosa. La preghiamo di
prendere conoscenza delle Schede Techniche necessarie legate alla Sicurezza dei Materiali e di
abituarsi con tutte le procedure di sicurezza prima di manip olare ogni prodotto chimico.
1—11
Instrument Keys and Display
Item Description
1 POWER/BACKLIGHT Key
2
ZERO/SCROLL Key
3
MENU Key
4 Numeric Display
5 Range Indicator
6 Range Indicator
7 Menu Indicator
8 Calibration Adjusted Indicator
9 Battery Low Indicator
10
READ/ENTER Key
1—12
Instrument Cap Cord
The instrument cap for the Pocket Colorimeter™ II doubles as a light shield.
Accurate measurements cannot be obtained unless the sample or blan k is covered
with the cap. Use the instrument cap cord to secure the cap to the body of the
colorimeter and prevent loss of the cap. See Figu re 1 on page 1—13.
1. Loop the instrument cap cord through the ring on the cap.
2. Remove the battery compartment cover. Press the knotted end of the cord into
the hole indicated by the arro w.
3. Slide the cord into the slot on the battery compartment cover. Snap the cover
into place.
1—13
Instrument Cap Cord, continued
Figure 1 Attaching the Instrument Cap Cord
1—14
1—15
Bromine, Total, LR (0.05 to 4.50 mg/L Br
2
)
Method 8016
For water, wastewater, and seawater
DPD Method* (PermaChem® Powder Pillows or AccuVac® Ampuls)
Measuring Hints
• Analyze samples immediately . Do not use plastic containers to collect sample s.
Note:
The Pocket Colorimeter™ II is designed to measure solutions contained in sample cells.
DO NOT
dip the meter in the sample or pour the sample directly into the cell holder.
Note:
If the sample temporarily turns yellow after reagent addition, or if the display shows
overrange (page 2—10), dilute a fresh sample and repeat the test. A slight loss of bromine
may occur because of the dilution. Multiply the result by the appropriate dilution factor.
* Adapted from Standard Methods for Examination of Water and Wastewater.
1—16
Bromine, Total, LR, continued
Bromine, Total, Low Range (using Powder Pillows)
1.Fill a 10-mL sample cell
sample (the blank). Cap.
Note:
Samples must be
analyzed immediately and
cannot be preserved for later
analysis.
2.Pr ess the POWER key to
turn the meter on.
The arrow sh ould indicate
the low range channel (LR).
Note:
See page 2—4 for
information on selecting the
correct range channel.
3.Remove the instrument
cap. Place the blank in the
cell holder. Cover the blank
with the instrument cap.
Note:
Wipe excess liquid and
fingerprints from the sample
cells.
1—17
Bromine, Total, LR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.00”.
Remove the blank fro m the
cell holder.
5.Fill a second sample cell
to the 10 mL line with
sample. Wipe off any liquid
or fingerprints.
6.Ad d the cont ents of one
DPD Total Chlorine Powder
Pillow to the sample cell (the
prepared sample).
Note:
The SwifTest™
Dispenser for total chlorine
can be used in place of the
powder pillow.
1—18
Bromine, Total, LR, continued
7.Cap and s hake gently for
20 seconds.
Note:
Shaking dissipates
bubbles that may form in
samples with dissolved gases.
Note:
A pink color will
develop if bromine is present.
Note:
Wipe liquid off sample
cells.
8.Place the prepared
sample in the cell holder and
cover with the instrument
cap. Wait at least three but
no more than six minutes
after adding the DPD Total
Chlorine Pillow.
Note:
Accuracy is not
affected by undissolved
powder.
9.Press READ/ENTER.
The display will show
“- - - -”, followed by results
in mg/L bromine.
1—19
Bromine, Total, LR, continued
Bromine, Total, Low Range (using AccuVac® Ampuls)
1.Fill a 10-mL sample
cell with sample (the
blank). Cap. Collect at
least 40 mL of sample in
a 50-mL beaker.
Note:
Samples must be
analyzed immediately and
cannot be preserved for
later analysis.
2.Press the POWER key
to turn the meter on.
The arrow should indicate
the low range channel
(LR).
Note:
See page 2—4 for
information on selecting
the correct range channel.
3.Remove the instrument
cap. Place the blank in the
cell holder. Cover the
blank with the instrument
cap.
Note:
Wipe excess liquid
and fingerprints from the
sample cells.
1—20
Bromine, Total, LR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.00”.
Remove the blank from
the cell holder.
5.Fill a DPD Total
Chlorine Reagent AccuV ac
Ampul with sample. Keep
the tip of the ampule
immersed until the ampule
fills completely.
6.Quickly invert the
ampul several times to
mix. Wipe off any liquid or
fingerprints.
Note:
A pink color will
form if bromine is present.
Note:
Accuracy is not
affected by undissolved
powder.
1—21
Bromine, Total, LR, continued
7.Place the prepared
sample in the cell holder
and cover with the
instrument cap. Wait at
least three but no more
than six minutes after
filling the ampule.
Note:
Wipe liquid off
sample cells.
8.Press READ/ENTER.
The display will show
“- - - -”, followed by
results in mg/L bromine.
1—22
Bromine, Total, LR, continued
Sampling and Storage
Analyze samples immediately. Do not collect samples in plasti c con tai ners.
Accuracy Check
Standard Additions Method
1. Snap the neck off a low range Chlorine Standard Solution PourRite® Ampule,
20–30 mg/L Cl
2
.
2. Use a TenSette
®
pipet to add 0.1, 0.2, and 0.3 mL of standard to three 10-mL
samples. Swirl gently to mix. (For AccuVac Ampuls, use 0.3, 0.6, and 0.9 mL
of standard and a 30-mL sample in a 50-mL beaker.)
3. Analyze each sample as described in the procedure. Each 0.1 mL of stan da rd
will cause an incremental increase in the apparent bromine concentration. The
exact value depends on the concentration of the ampule standard. Check the
certificate enclosed with the standard ampules for the chlorine concentration.
Multiply the expected chlorine concentration by 2.25 to determine the
expected increase in bromine concentration.
1—23
Bromine, Total, LR, continued
Standard Solution Method
Standard solutions for bromine or chlorine are difficult and time-consuming to
prepare. Errors can occur if attention to detail is not addressed during preparation
of the standards. Hach Company prepares the calibration curve under rigorous
analytical laboratory conditions. Hach strongly recommends using the facto ry
calibration.
A user calibration or a user-prepared br omine standard may be required by a
regulatory official or agency. Two options are available on the Pocket
Colorimeter™ II to meet this requirement.
A bromine standard may be prepared and used to validate th e calib ration curve
using the Standard Calibration Adjust feature (see page 2—13 for more
information.). The concentration of the prepared standard must be determined with
an alternate instrument such as a spectrophotometer, colorimeter, amperometric
titration, or by using another alternate method. The concentration of the bromine
standard for the low range procedure must be between 2.00 and 4.00 mg/L
bromine.
In addition, a user-generated calibration curve can be made and programmed into
the Pocket Colorimeter™ II. See User-Entered Calibration on page 2—15.
1—24
Bromine, Total, LR, continued
If a chlorine standard is used, multiply its concentration by 2.25 to determine the
equivalent bromine concentration.
Interferences
Interfering
Substance
Interference Levels and Treatments
Acidity Greater than 150 mg/L CaCO3. May not develop full color or
color may fade instantly. Neutralize to pH 6–7 with 1 N Sodium
Hydroxide. Determine amount to be added on separate 10-mL
sample, then add the same amount to the sample being tested.
Correct for the additional volume.
Alkalinity Greater than 250 mg/L CaCO
3
. May not develop full color or
color may fade instantly. Neutralize to pH 6–7 with 1 N Sulfuric
Acid. Determine amount to be added on separate 10-mL sample,
then add the same amount to the sample being tested. Correct
for the additional volume.
Chlorine, Cl
2
Interferes at all levels
1—25
Bromine, Total, LR, continued
Hardness No effect at less than 1,000 mg/L as CaCO
3
Iodine, I
2
Interferes at all levels
Manganese,
Oxidized
(Mn
4+
, Mn7+) or
Chromium,
Oxidized (Cr
6+
)
1. Adjust sample pH to 6–7.
2. Add 3 drops Potassium Iodide (30-g/L) (Cat. No. 343-32)
to a 25-mL sample.
3. Mix and wait one minute.
4. Add 3 drops Sodium Arsenite (5-g/L) (Cat. No. 1047-32)
and mix.
5. Analyze 10 mL of the treated sample as described in
the procedure.
6. Subtract the result of this test from the original analysis
result to obtain the correct chlorine concentration.
Monochloramine Interferes at all levels.
Ozone Interferes at all levels.
Interfering
Substance
Interference Levels and Treatments
1—26
Bromine, Total, LR, continued
Method Performance
Estimated Detection Limit (EDL) = 0.05 mg/L Br
2
Typical Precision (95% confidence interval) = 2.25 ± 0.11 mg/L Br
2
1—27
Bromine, Total, HR (0.2 to 10.0 mg/L Br
2
)
Method 8016
For water, wastewater, and seawater
DPD Method* (PermaChem® Powder Pillows)
Measuring Hints
• If the bromine concentration is typically less than 4 mg/L, use the low range
procedure.
• Analyze samples immediately . Do not use plastic containers to collect sample s.
Note:
The Pocket Colorimeter II is designed to measure solutions contained in sample cells.
DO NOT
dip the meter in the sample or pour the sample directly into the cell holder.
* Adapted from Standard Methods for Examination of Water and Wastewater.
1—28
Bromine, Total, HR, continued
1.Fill a 1-cm/10-mL
sample cell with sample.
Cap. This is the blank.
Note:
Samples must be
analyzed immediately and
cannot be preserved for later
analysis.
2.Pr ess the POWER key to
turn the meter on.
The arrow sh ould indicate
the high range channel (HR).
Note:
See page 2—4 for
information on selecting the
correct range channel.
3.Remove the meter cap.
Place the blank into the cell
holder, with the diamond
mark facing the back of the
cell holder. Cover the cell
with the cap.
Note:
Wipe excess liquid and
fingerprints from the sample
cells.
1—29
Bromine, Total, HR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.0”.
Remove the blank fro m the
cell holder.
5.Fill another 1-cm/1 0-mL
sample cell to the 5-mL line
with sample.
6.Add the contents of two
DPD Total Chlorine Powder
Pillows to the sample cell
(the prepare d sample).
Note:
The SwifTest™
Dispenser for Total Chlorine
can be used in place of the
powder pillows. Use two
dispensations from the
dispenser.
1—30
Bromine, Total, HR, continued
7.Cap and s hake gently for
20 seconds.
Note:
Shaking dissipates
bubbles that may form in
samples with dissolved gases.
Note:
A pink color will
develop if bromine is present.
Note:
Wipe liquid off sample
cells.
8.Place the prepared
sample in the cell holder and
cover with the instrument
cap. Wait at least three but
no more than six minutes
after adding the DPD Total
Chlorine Pillows.
Note:
Accuracy is not
affected by undissolved
powder.
9.Press READ/ENTER.
The display will show
“- - - -”, followed by results
in mg/L bromine.
10
m
L
5
m
L
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