LaMotte DPD TEST KIT 5910 - Manual (Page 2)

PRO CE DURE
FREE AVAILABLE CHLORINE
1.
Rinse a test tube (0106) with sample water. Fill test tube to 5 mL line
with sample water.
2. Add one *Chlorine DPD #1R Tablet (6999A). Cap and shake until
tablet disintegrates.
3. Immediately insert test tube into Chlorine DPD Comparator (3596).
Match sample color to a color standard. Record as ppm free available
chlorine.
NOTE:
Save sample if total residual and combined chlorine are to be
determined.
TOTAL RESIDUAL CHLORINE & COMBINED CHLORINE
5.
Add one *Chlorine DPD #3R Tablet (6905A) to the sample from
Step 3. Cap and shake until tablet disintegrates.
6. Insert test tube into Chlorine DPD Comparator (3596). Match
sample color to a color standard. Record as ppm total residual
chlorine.
7. Calculate combined chlorine:
Combined Chlorine (ppm) =
Total Residual Chlorine - Free Available Chlorine
NOTE: Thoroughly clean and rinse test tubes after each test.
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
9/06