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Hydrogen peroxide – shock – LaMotte SMART3 Colorimeter User Manual

Page 189

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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