LaMotte DPD CHLORINE TEST KIT LP-1-NMC User Manual
Page 3
TOTAL RESIDUAL CHLORINE AND COMBINED CHLORINE
1.
Rinse test tube (0106) with sample water. Fill to 10 mL line with
sample water.
2.
Add one *Chlorine DPD #1R Tablet (6999A). Cap and mix until
tablet disintegrates.
3.
Immediately insert test tube into Chlorine DPD Comparator (6978).
Match sample color to a color standard. Record as ppm Free
Available Chlorine.
4.
Add one *Chlorine DPD #3R Tablet (6905A). Cap and mix until
tablet disintegrates.
5.
Insert test tube into Chlorine DPD Comparator (6978). 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
*Chlorine DPD #4 Tablet determines Total Residual Chlorine and is used
where a differentiation in the type of chlorine is not required.
1.
Rinse test tube (0106) with sample water. Fill to 10 mL line with
sample water.
2.
Add one *Chlorine DPD #4 Instrument Grade Tablet (6906A). Cap
and mix until tablet disintegrates.
3.
Insert test tube into Chlorine DPD Comparator (6978). Match
sample color to a color standard. Record as ppm Total Residual
Chlorine.