Test Procedures
CHLORINE DIOXIDE
DPD METHOD • CODE 3644-SC
QUANTITY
CONTENTS
CODE
100
DPD #1 Instrument Grade Tablets
6903A-J
15 mL
Glycine Solution
6811-E
*WARNING:
Reagents marked with an * are considered to be potential health hazards. To
view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit code
number. For example, if the code is 4450WT-H, search 4450. To obtain a printed copy,
contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
Chlorine dioxide is used as a substitute for and an adjunct to chlorine in water treatment.
It is better than chlorine in eliminating taste and odor in certain cases. Chlorine dioxide,
unlike chlorine, does not produce carcinogenic chlorinated organic compounds when
reacted with organic materials. A disadvantage is the higher cost of producing chlorine
dioxide compared to chlorine.
APPLICATION:
Drinking water; swimming pool water; domestic and industrial
wastewater; food sanitation.
RANGE:
0.00–7.00 ppm Chlorine Dioxide
MDL:
0.04 ppm
METHOD:
Chlorine dioxide reacts with DPD to form a red color in
proportion to the concentration.
SAMPLE HANDLING &
PRESERVATION:
Test as soon as possible to avoid loss of chlorine dioxide.
INTERFERENCE:
Chlorine interference can be removed with the use of glycine.
Very high levels of chloramines may interfere if the test result
is not read immediately. Oxidized manganses interferes but
can be removed with arsenite. Bromine and iodine interfere.
Chromate interference can be removed with a thioacetamide
blank correction.
SMART Spectro 2 Test Procedures 05.02.16
CHLORINE DIOXIDE
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