Owner's manual

APPLICATION: Drinking, surface, and saline waters; domestic and
industrial wastes.
RANGE: 0.00–1.00 ppm Chromium
MDL: 0.01 ppm
METHOD: The trivalent chromium is converted to hexavalent
chromium by permanganate under acidic conditions.
Hexavalent chromium reacts with 1,5 diphenyl-
carbohydrazide under acidic conditions to form a red-
purple color in proportion to the amount of chromium
present.
SAMPLE HANDLING &
PRESERVATION:
Analysis for chromium should be made as quickly
as possible after sample collection since storage in
glass or plastic containers may result in low chromate
values.
INTERFERENCES: High concentrations of mercurous and mercuric ions
may interfere.
CHROMIUM-Hexavalent, Trivalent & Total SMART Spectro Test Procedures 2.11
Test Procedures