DR/2400
Chlorine, Total
ChlorineTot_AVPP_Other_DPD_Eng_Ody.fm Page 1 of 6
• Samples must be analyzed immediately and cannot be preserved for later analysis.
• After adding the reagent, a pink color will develop if chlorine is present.
• If the test overranges, dilute the sample with a known volume of high quality, chlorine demand-free water
(Cat. No. 26415-49), and repeat the test. Some loss of chlorine may occur due to the dilution. Multiply the result by the dilution
factor. See Section 2.7 Sample Dilution on page 21.
• For chloramination disinfection control, use Method 10172, Chloramine (Mono), Low Range (program number 66) or High Range
(program number 67).
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
Chlorine, Total
(Method 8167
DPD Method*
*Adapted from Standard Methods for the Examination of Water and Wastewater
Powder Pillows or AccuVac
®
Ampuls
(0.02 to 2.00 mg/L)
Scope and Application: For testing residual chlorine and chloramines in water, wastewater, estuary
water, and seawater; USEPA-accepted for reporting** for drinking and wastewater analyses.
** Procedure is equivalent to USEPA method 330.5 and Standard Method 4500-Cl G for drinking water and wastewater analyses.
1. Touch
Hach Programs.
Select program
80 Chlor. F&T.
Touch
Start.
2. Fill a round sample
cell with 10 mL of
sample.
3. Add the contents of
one DPD Total Chlorine
Powder Pillow to the
sample cell. (This is the
prepared sample).
Swirl the sample cell for
20 seconds to mix.
4. Touch the timer icon.
Touch
OK.
A three-minute reaction
period will begin. Perform
steps 5 and 6 during this
time period.
Tips and Techniques
Powder Pillows Method 8167
Hach Programs
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