Test Procedures
HYDROGEN PEROXIDE, LOW RANGE
DPD METHOD • CODE 3662-SC
QUANTITY
CONTENTS
CODE
30 mL
Hydrogen Peroxide Reagent #1
6452-G
100
*Hydrogen Peroxide LR Tablets
*6454A-J
1
Tablet Crusher
0175
*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).
Hydrogen peroxide, H
2
O
2
, is a colorless compound that is widely used as a bleaching or
decolorizing agent in the manufacture of many commercial products. As an oxidizing
compound it is also used in the treatment of sewage to reduce odors and corrosion due to
hydrogen sulfi de. It may also be used as a sanitizing agent for water treatment. Hydrogen
peroxide is relatively unstable, and for this reason it dissipates quickly and leaves no
residuals.
APPLICATION:
Drinking and surface waters; domestic and industrial wastes.
RANGE:
0.00–1.50 ppm Hydrogen Peroxide
MDL:
0.02 ppm
METHOD:
Hydrogen peroxide reacts with an excess of potassium iodide
through the action of a catalyst and buff er to release an
equivalent amount of iodine. The iodine in turn reacts with
diethyl-p-phenylenediamine (DPD) to produce a pink-red
color in proportion to the iodine released.
SAMPLE HANDLING &
PRESERVATION:
Hydrogen peroxide is not stable in aqueous solutions.
Exposure to sunlight and agitation will accelerate the
reduction of hydrogen peroxide in dilute solutions. For best
results start analysis immediately after sampling.
INTERFERENCE:
The likelihood of other oxidizing compounds interfering
with this method is eliminated by the presence of hydrogen
peroxide. Manganese may interfere and should be removed
before analysis.
SMART Spectro 2 Test Procedures 05.02.16
HYDROGEN PEROXIDE
, LOW RANGE
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