LaMotte SMART3 Colorimeter - Manual (Page 189)

HYDROGEN PEROXIDE – SHOCK
DPD METHOD • CODE 4045-01
QUANTITY CONTENTS CODE
30 mL *Hydrogen Peroxide Reagent #1 *6452-G
2 x 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 Material Safety Data Sheet (MSDS) for these reagents
go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,
phone or fax.
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: 0–300 ppm Hydrogen Peroxide Shock
MDL: 5 ppm
METHOD: Hydrogen peroxide reacts with an excess of potassium
iodide through the action of a catalyst and buffer 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.
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
SMART3 Test Procedures 5.12 HYDROGEN PEROXIDE, Shock
Test P
rocedures