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2003•Journal of Yancheng Institute of TechnologyRequires access

Determination of Trace Iron(III) by Catalytic Kinetic Spectrophotometry of H_2O_2-Fe(III)-RhB System

XU Mao-rong

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Abstract

A kinetic spectrophotometric method for determination of trace iron(Ⅲ) was established. It was based on the discoloring reaction of rhodamine B with hydrogen peroxide catalyzed by Fe(Ⅲ)In.HAc-NaAc solution(pH=3.2). The absorption maximum is at 550 nm and Beer's law is obeyed in the range of 0～1.0 μg/25 mL of Fe(Ⅲ).The detection limit of this method is 2.96×10 -9 g/mL. This method was applied to the determination of iron in water with satisfactory results.

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What this paper is about

A kinetic spectrophotometric method for determination of trace iron(Ⅲ) was established. It was based on the discoloring reaction of rhodamine B with hydrogen peroxide catalyzed by Fe(Ⅲ)In.HAc-NaAc solution(pH=3.2). The absorption maximum is at 550 nm and Beer's law is obeyed in the range of 0～1.0 μg/25 mL of Fe(Ⅲ).The detection limit of this method is 2.96×10 -9 g/mL. This method was applied to the determination of iron in water with satisfactory results.

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Available abstract

A kinetic spectrophotometric method for determination of trace iron(Ⅲ) was established. It was based on the discoloring reaction of rhodamine B with hydrogen peroxide catalyzed by Fe(Ⅲ)In.HAc-NaAc solution(pH=3.2). The absorption maximum is at 550 nm and Beer's law is obeyed in the range of 0～1.0 μg/25 mL of Fe(Ⅲ).The detection limit of this method is 2.96×10 -9 g/mL. This method was applied to the determination of iron in water with satisfactory results.

Key concepts: Detection limit, Hydrogen peroxide, Spectrophotometry, Rhodamine B, Chemistry, Kinetic energy, Catalysis, Linear range

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