LaMotte LB-DC User Manual

CHLO RINE BLEACH TEST KIT

DROP COUNT METHOD

MODEL LB-DC • CODE 7894

QUANTITY CONTENTS CODE

30 mL *Hypochlorite Reagent A *7939PS-G
30 mL Hypochlorite Reagent B 7940-G
60 mL Hypochlorite Reagent C 7941PS-H
2 Test Tubes, 5-10-15 mL, glass, w/caps 0778
2 Pipets, 0.5 mL, plastic, w/caps 0369
1 Pipet, 0.5 mL, plastic 0353
1 Pipet, plain, glass 0342

*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.

PRO CE DURE A: 0-0.1% (0-1000 ppm)

1. Fill test tube (0778) to 5 mL line with sample solution.

2. Use a pipet (0369) to add 0.5 mL of Hypochlorite Reagent B (7940).

Swirl to mix.

3. Use second pipet (0369) to add 0.5 mL of *Hypochlorite Reagent A
(7939PS). Swirl to mix. Sample will turn brown.

4. Fill glass pipet (0342) with Hypochlorite Reagent C (7941PS). Hold
pipet vertically. While gently swirling tube, add Hypochlorite
Reagent C, one drop at a time, until brown color disappears. Count
the number of drops added.

5. Calculate result:

Available Chlorine, % = 0.005 x Number of Drops

Available Chlorine, ppm = 50 x Number of Drops

PRO CE DURE B: 0-1.0% (0-10 ppt)

1. Use 0.5 mL pipet (0353) to add 0.5 mL of the sample solution to a
test tube (0778). Dilute to 5 mL line with tap water. Cap and mix.

2. Use a pipet (0369) to add 0.5 mL of Hypochlorite Reagent B (7940).
Swirl to mix.

3. Use second pipet (0369) to add 0.5 mL of *Hypochlorite Reagent A
(7939PS). Swirl to mix. Sample will turn brown.

4. Fill glass pipet (0342) with Hypochlorite Reagent C (7941PS). Hold
pipet vertically. While gently swirling tube, add Hypochlorite
Reagent C, one drop at a time, until brown color disappears. Count
the number of drops added.

5. Calculate result:

Available Chlorine, % = 0.05 x Number of Drops

Available Chlorine, ppt = 0.5 x Number of Drops

PRO CE DURE C: 0-10% (0-100 ppt)

1. Use the 0.5 mL pipet (0353) to add 0.5 mL of the sample solution to a
test tube (0778). Dilute to 5 mL line with tap water. Cap and mix.

2. Use the 0.5 mL pipet to transfer 0.5 mL of the diluted sample to second test
tube (0778). Dilute to 5 mL line with tap water. Cap and mix.

3. Use a pipet (0369) to add 0.5 mL of Hypochlorite Reagent B (7940).
Swirl to mix.

4. Use second pipet (0369) to add 0.5 mL of *Hypochlorite Reagent A
(7939PS). Swirl to mix. Sample will turn brown.

5. Fill glass pipet (0342) with Hypochlorite Reagent C (7941PS). Hold
pipet vertically. While gently swirling tube, add Hypochlorite
Reagent C, one drop at a time, until brown color disappears. Count
the number of drops added.

6. Calculate result:

Available Chlorine, % = 0.5 x Number of Drops

LaMOTTE COM PANY

Helping Peo ple Solve An a lyt i cal 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

®

10.10