Test Procedures
HYDROGEN PEROXIDE, SHOCK
DPD METHOD • CODE 4045
QUANTITY
CONTENTS
CODE
30 mL
Hydrogen Peroxide Reagent #1
6452-G
100
*Hydrogen Peroxide LR Tablets
*6454A-J
1
Tablet Crusher
0175
1
Pipet, glass
0342
*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).
Large quantities of hydrogen peroxide shock are added to a swimming pool to “shock”
it. Shocking breaks down waste products and re-establishes a positive level of sanitizer.
While many types of shock can be used with chlorine or bromine pools, only hydrogen
peroxide shock can be used to shock biguanide pools.
APPLICATION:
Swimming pools
RANGE:
0–225 ppm Hydrogen Peroxide Shock
MDL:
4 ppm
METHOD:
Hydrogen peroxide shock 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 shock 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.
INTERFERENCES:
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
, SHOCK
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