DR/2400
Chlorine, Total
ChlorineTot_TNT_Other_DPD_Eng_Ody.fm Page 1 of 4
• Analyze samples immediately. Do not preserve samples for later analysis.
• After adding sample to the Test ‘N Tube™, a pink color will develop if total chlorine is present.
• For more accurate results, determine a reagent blank value for each new lot of reagent. Follow the procedure using deionized
water in place of the sample. Subtract the reagent blank value from the final results or perform a reagent blank adjust
. See the
instrument manual for more information on Running a Reagent Blank.
• For chloramination disinfection control, use Method 10172, Chloramine (Mono), High Range.
• 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 10101
DPD Method*
*Adapted from Standard Methods for the Examination of Water and Wastewater.
Test ‘N Tube™ Vials
(0.09 to 5.00 mg/L)
Scope and Application: For testing higher levels of total (free plus combined) chlorine in drinking
water, treated wastewater, cooling water, or industrial process water
1. Touch
Hach Programs.
Select program
89 Chlor. F&T HR TNT.
Touch
Start.
2. Fill an empty
Test ‘N Tube™ vial to the
top of the Hach label with
sample. (This is the
blank.)
3. Wipe the outside of
the vial with a damp
towel, then a dry towel to
remove fingerprints and
other marks.
4. Install the 16-mm
adapter.
Note: See Section 2.6 Sample
Cell Adapters in the Instrument
Manual for installation details.
Insert the blank into the
adapter.
Tips and Techniques
Test ‘N Tube Method 10101
Hach Programs
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