Catalytic kinetic determination of trace amounts of iron(III) with polarographic detection

Document Type

Article

Publication Date

1-1-1997

Abstract

This method is based on the catalytic effect of Fe3+ on the oxidation reaction between Acid Chrome Blue K and potassium bromate in sulfuric acid medium at 100°C, and in 0.08 mol/L NH4OH - 0.01mol/L (NH4)2 SO4 supporting electrolyte, Acid Chrome Blue K exhibits a sensitive polarographic wave at -0.55V vs. SCE, and change of concentration is traced by a polarographic detection technique. The linear range of Fe3+ is 10-100ng/mL. This new catalytic method has been applied to the determination of iron in natural water and food with satisfactory results.

Publication Source (Journal or Book title)

Analytical Letters

First Page

2099

Last Page

2107

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