LaMotte LP-26 User Manual

FREE, TOTAL & COMBINED

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EPA

COMPLIANTCOMPLIANT

CHLORINE TEST KIT

MODEL LP-26 · CODE 6817

QUANTITY CONTENTS CODE

50 *Chlorine DPD #1R Tablets (6999A) *6905A-6999ABOX
50 *Chlorine DPD #3R Tablets (6905A)
2 Test Tubes, 5 mL, glass, w/caps 0230
1 Chlorine DPD Comparator, 0.2-3.0 ppm 6902

*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.

To order individual reagents or test kit components, use the specified code number.

USE OF THE OCTET COM PARA TOR

The Octet Comparator contains eight
permanent color standards. A test sample is
inserted into the openings in the top of the
comparator. The sample can then be compared
to four color standards at once, and the value
read off the comparator. For optimum color
comparison, the comparator should be
positioned between the operator and a light
source, so that the light enters through the
special light-diffusing screen in the back of the
comparator. Avoid viewing the comparator
against direct sunlight or an irregularly lighted
background.

EPA AC CEPTED PROCEDURE

EPA Accepted for NPDWR compliance monitoring. For compliance
monitoring a Check Standard should be prepared. A fresh solution
should be prepared daily.

CHECK STANDARD PREP A RA TION: 1 ppm equiv a lent so lu tion

1. Place 891 mg potassium permanganate in a 1 liter volumetric flask.
Dilute to 1 liter with distilled or deionized water. This is the stock
solution.

NOTE: This stock solution should be prepared fresh daily.

2. Transfer 1 mL to a 1 liter volumetric flask. Dilute to 1 liter with

distilled or deionized water. This solution is equivalent to 1 ppm
Free Available Chlorine.

PRO CE DURE

FREE AVAIL ABLE CHLO RINE

1. Rinse a test tube with sample water. Fill to 5 mL line with the
sample water.

2. Add one *Chlorine DPD #1R Tablet (6999A). Cap and shake until
tablet disintegrates.

3. Immediately insert test tube into Chlorine DPD Comparator
(6902). Match sample color to a color standard. Record as ppm
Free Available Chlorine.

NOTE: Save sample for total residual and combined chlorine tests.

TO TAL RE SID UAL CHLO RINE & COM BINED CHLO RINE

4. Add one *Chlorine DPD #3R Tablet (6905A) to the sample from
Step 3. Cap and shake until tablet disintegrates.

5. Insert test tube into Chlorine DPD Comparator (6902). Match
sample color to a color standard. Record as ppm Total Residual
Chlorine.

6. Subtract Free Available Chlorine from Total Residual Chlorine.
Record as ppm Combined Chlorine.

Combined Chlorine, ppm =

Total Residual Chlorine - Free Available Chlorine

NOTE: Thoroughly clean and rinse test tubes after each test.

LaMOTTE COM PANY

Helping People Solve Analytical Challenges

PO Box 329 • Chestertown • Mary land • 21620 • USA

800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax [phone]

Visit us on the web at www.lamotte.com

®

66817-4.11