LaMotte CL-BR User Manual
BRO MINE/CHLO RINE TEST KIT
DIRECT READING TITRATOR METHOD
MODEL CL-BR • CODE 3624
QUANTITY CONTENTS CODE
5 g *DPD #1 Powder *6807-C
50 *Chlorine DPD #3R Tablets *6905A-H
60 mL Chlorine/Bromine Titrant 3992DR-H
1 Test Tube, 10 & 22.5 mL, w/cap 0753
1 Direct Reading Titrator, 0-10 Range 0377
1 Spoon, 0.1 g, plastic 0699
1 Pipet, 1.0 mL, plastic 0354
*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.
Read the Direct Reading Titrator Manual before proceeding. Each minor
division equals 0.2 ppm.
PRO CE DURE
BROMINE (0 - 10 ppm)
1. Fill the test tube (0753) to the 22.5 mL line with sample water.
2. Use the 0.1 g spoon (0699) to add 0.1 g of *DPD #1 Powder (6807).
Cap and gently swirl until powder dissolves. Solution will turn red if
bromine is present.
3. Fill the Direct Reading Titrator (0377) with the Chlorine/Bromine
Titrant (3992). Insert the Titrator tip into the center hole of the test
tube cap.
4. While gently swirling the tube, slowly press plunger to titrate until red
color completely disappears.
5. Read the test result directly from the scale where the large ring on the
Titrator meets the Titrator barrel. Record as ppm Bromine.
63624-5/10
CHLORINE (0 - 10 ppm)
1. Fill the test tube (0753) to the 10 mL line with sample water.
2. Use the 0.1 g spoon (0699) to add 0.1 g of *DPD #1 Powder (6807).
Cap and gently swirl until powder dissolves. Solution will turn red if
chlorine is present.
3. Fill the Direct Reading Titrator (0377) with the Chlorine/Bromine
Titrant (3992). Insert the Titrator tip into the center hole of the test
tube cap.
4. While gently swirling tube, slowly press the plunger to titrate until the
red color completely disappears.
5. Read the test result directly from the scale where the large ring on the
Titrator meets the Titrator barrel. Record as ppm Free Available
Chlorine. Do not move the plunger if total chlorine is to be
determined.
6. Carefully remove the cap and Titrator. Add one *Chlorine DPD #3R
Tablet (6905A). Cap and swirl until tablet disintegrates. The
reappearance of a red color indicates combined chlorine.
7. Continue titration until the red color again disappears.
8. Read the test result directly from the scale where the large ring on the
Titrator meets the Titrator barrel. Record as ppm Total Chlorine.
ppm Combined Chlorine = ppm Total Chlorine - ppm Free Chlorine
CHLORINE (0 - 100 ppm)
1. Use the 1.0 mL pipet (0354) to add 1.0 mL of sample water to the test
tube (0753).
2. Fill the test tube to the 10 mL line with tap or deionized water. Swirl to
mix.
3. Follow Steps 2 - 5 of the Chlorine procedure above. Multiply the
titrator reading from Step 5 by 10 to determine ppm Free Available
Chlorine.
4. Follow Steps 6 - 8 of the Chlorine procedure above. Multiply the
titrator reading from Step 8 by 10 to determine ppm Total Chlorine.
ppm Combined Chlorine = ppm Total Chlorine - ppm Free Chlorine
NOTE: This method may be used to test chlorine concentrations
greater than 100 ppm by refilling the titrator and adding an additional
0.1 g spoon of *DPD #1 Powder (6807) for every additional 100 ppm
chlorine present in the sample water.
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 410-778-6394
Visit us on the web at www.lamotte.com
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