LaMotte DPD CHLORINE KIT SL-1 - Manual (Page 2)

PROCEDURE
FREE AVAILABLE CHLORINE
1. Fill a test tube (0106) to 5 mL line with sample water.
2. Add one *Chlorine DPD #1 Tablet (6999A). Cap and mix until tablet disintegrates.
Solution will turn pink if chlorine is present.
3. Insert test tube into the Octa-Slide 2 Viewer (1101). Slide the 0.2 to 3.0 ppm
Chlorine Octa-Slide 2 Bar (3401-01) into the viewer. Match sample color to a
color standard. Record as Reading A. Save sample for further tests.
Free Available Chlorine (ppm) = Reading A
MONOCHLORAMINE
4. Add one Chlorine DPD #2 Tablet (6904A) to sample from Step 3. Cap and mix
until tablet disintegrates.
5. Insert test tube into the Octa-Slide 2 Viewer (1101). Match sample color to a color
standard. Record as Reading B.
Monochloramine (ppm Chlorine) = Reading B - Reading A
DICHLORAMINE & TOTAL RESIDUAL CHLORINE
6. Add one *Chlorine DPD #3 Tablet (6905A) to the sample from Step 5. Cap and
mix until tablet disintegrates.
7. Insert test tube into the Octa-Slide 2 Viewer (1101). Match sample color to a color
standard. Record as Reading C.
Dichloramine (ppm Chlorine) = Reading C - Reading B
Total Residual Chlorine, ppm = Reading C
TOTAL RESIDUAL CHLORINE & COMBINED CHLORINE
1. Rinse test tube (0106) with sample water. Fill to 5 mL line with sample water.
2. Add one *Chlorine DPD #1 Tablet (6999A). Cap and mix until tablet
disintegrates.
3. Immediately insert test tube into the Octa-Slide Viewer (1101). Match sample
color to a color standard. Record as ppm Free Available Chlorine.
4. Add one *Chlorine DPD #3 Tablet (6905A) to the same sample. Cap and mix
until disintegrated.
5. Insert test tube into Octa-Slide 2 Viewer (1101). Match sample color to a color
standard. Record as ppm Total Residual Chlorine.
Combined Chlorine, ppm =
Total Residual Chlorine - Free Available Chlorine
TOTAL RESIDUAL CHLORINE
The *Chlorine DPD #4 Tablet determines Total Residual Chlorine and is used where a
differentiation in the type of chlorine is not required.
1. Rinse the test tube (0106) with sample water. Fill to 5 mL line with sample water.
2. Add one *Chlorine DPD #4 Tablet (6906A). Cap and mix until tablet
disintegrates.
3. Insert test tube into Octa-Slide 2 Viewer (1101). Match sample color to a color
standard. Record as ppm Total Residual Chlorine.