LaMotte CHLORINE KIT, DUAL RANGE SL-16 - Manual (Page 2)

EPA ACCEPTED PROCEDURE
EPA accepted for NIPDWR monitoring. For compliance monitoring a Check
Standard should be prepared.
CHECK STANDARD PREPARATION: 1 ppm Equivalent Solution
1. Dissolve 891 mg of potassium permanganate in 1000 mL of distilled water in a
volumetric fl ask (1000 ppm equivalent solution).
2. Dilute 1 mL of this solution to 1000 mL with distilled water in a volumetric fl ask.
This solution is equivalent to 1 ppm Free Available Chlorine.
PROCEDURE
FREE AVAILABLE CHLORINE
1. Fill a test tube (0106) to the 5 mL line with sample water.
2. Add one *Chlorine #1R Tablet (6999A). Cap and mix until tablet disintegrates.
A pink to red color indicates the presence of Chlorine.
3. Insert test tube into the top of the Octa-Slide 2 Viewer (1101). Slide the 0.1 to 1.0
ppm Chlorine Octa-Slide 2 Bar (3405-01) into the Octa-Slide 2 Viewer. Match
sample color to a color standard. Record as ppm Free Available Chlorine.
4. If the sample is darker than the 1.0 standard, remove 0.1 to 1.0 Octa-Slide 2 Bar,
replace it with the 1.0 to 6.0 Octa-Slide 2 Bar (3404-01). Match sample color to
a color standard. Record as ppm Free Available Chlorine.
NOTE: Save sample for Total Residual and Combined Chlorine tests.
TOTAL RESIDUAL & COMBINED CHLORINE
5. Add one *Chlorine DPD #3R Tablet (6905A) to the sample from Step 4. Cap tube
and mix until tablet disintegrates.
6. Insert test tube into the Octa-Slide 2 Viewer (1101). Match sample color to a color
standard. Record as ppm Total Residual Chlorine.
7. Subtract Free Available Chlorine from Total Residual Chlorine. Record as ppm
Combined Chlorine.
Combined Chlorine = Total Residual Chlorine – Free Available Chlorine
NOTE: Thoroughly clean and rinse test tubes after each test.
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PO Box 329 • Chestertown • Maryland • 21620 • USA
800-344-3100 • 410-778-3100 (Outside U.S.A.) • Fax 410-778-6394
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