LaMotte BROMINE/CHLORINE TEST KIT CL-BR - Manual (Page 2)

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.
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