LaMotte 1200 COLORIMETER IRON 1200-FE - Manual (Page 4)

IRON TEST METHOD SPECIFICATIONS
APPLICATION
Drinking , surface, and saline waters; domestic and industrial wastes.
RANGE
0 to 4.0 ppm Iron
METHOD
Ferric iron is reduced to ferrous iron and subsequently forms a colored complex with
phenanthroline for a quantitative measure of total iron.
HANDLING & PRESERVATION
The sample container should be cleaned with acid and rinsed with deionized water.
Addition of acid to adjust the sample to pH 2 - 3 will prevent deposition of iron on the
container walls. Samples should be analyzed as soon as possible after collection since
ferrous iron undergoes oxidation to ferric iron.
INTERFERENCES
Strong oxidizing agents, cyanide, nitrite, phosphates, chromium, and zinc in
concentrations exceeding 10 times that of iron; cobalt and copper in excess of 5 mg/L,
and nickel in excess of 2 mg/L. Bismuth, cadmium, mercury, molybdate, and silver
precipitate phenanthroline.
LaMOTTE COMPANY
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PO Box 329 • Chestertown • Maryland • 21620 • USA
800-344-3100 • 410-778-3100 (Outside U.S.A.) • Fax 410-778-6394
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