LaMotte SMART3 Colorimeter User Manual

Page 106

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APPLICATION:

Drinking, surface, and saline waters; swimming pool water;

domestic and industrial waters and wastes.

RANGE:

0.0–20.0 ppm Bromine

MDL: 0.25

ppm

METHOD:

In buffered sample bromine reacts with diethyl-p-phenylene

diamine (DPD) to produce a pink-red color in proportion to

the concentration of bromine present.

SAMPLE

HANDLING &

PRESERVATION:

Bromine in aqueous solutions is not stable, and the bromine

content of samples or solutions, particularly weak solutions,

will rapidly decrease. Exposure to sunlight or agitation

will accelerate the reduction of bromine present in such

solutions. For best results start analysis immediately after

sampling. Samples to be analyzed for bromine cannot be

preserved or stored.

INTERFERENCE:

The only interfering substance likely to be encountered in

water is oxidized manganese. The extent of this interference

can be determined by treating a sample with sodium

arsenite to destroy the bromine present so that the degree

of interference can be estimated.

Iodine and chlorine can also interfere, but these are not

normally present unless they have been added as sanitizers.

BROMINE, UDV

SMART3 Test Procedures 11.10

Test P

rocedures

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