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2002•Chinese Journal of Spectroscopy LaboratoryRequires access

Catalytic Spectrophotometric Determination of Trace Cobalt Based on Oxidation of Bromopyrogallol Red by Hydrogen Peroxide

He Chun

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Abstract

A new catalytic spectrophotometric method for the determination of trace cobalt was developed. The method is based on the synergistic catalysis of trace amount of cobalt(Ⅱ) and EDTA on the oxidation of bromopyrogallol red by hydrogen peroxide in NH 3·H 2O NH 4Cl system. The linear range for the determination of cobalt is 0-1.3μg/mL and the detection limit is 2.6×10 -10 g/mL. The method has been applied to the determination of trace amount of cobalt in human urine, vitamin B 12 injection and lily with satisfactory results.

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What this paper is about

A new catalytic spectrophotometric method for the determination of trace cobalt was developed. The method is based on the synergistic catalysis of trace amount of cobalt(Ⅱ) and EDTA on the oxidation of bromopyrogallol red by hydrogen peroxide in NH 3·H 2O NH 4Cl system. The linear range for the determination of cobalt is 0-1.3μg/mL and the detection limit is 2.6×10 -10 g/mL. The method has been applied to the determination of trace amount of cobalt in human urine, vitamin B 12 injection and lily with satisfactory results.

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Available abstract

A new catalytic spectrophotometric method for the determination of trace cobalt was developed. The method is based on the synergistic catalysis of trace amount of cobalt(Ⅱ) and EDTA on the oxidation of bromopyrogallol red by hydrogen peroxide in NH 3·H 2O NH 4Cl system. The linear range for the determination of cobalt is 0-1.3μg/mL and the detection limit is 2.6×10 -10 g/mL. The method has been applied to the determination of trace amount of cobalt in human urine, vitamin B 12 injection and lily with satisfactory results.

Key concepts: Cobalt, Hydrogen peroxide, Catalysis, Chemistry, Detection limit, Linear range, Spectrophotometry, Inorganic chemistry

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Catalytic Spectrophotometric Determination of Trace Cobalt Based on Oxidation of Bromopyrogallol Red by Hydrogen Peroxide — Research Paper | ScholarLens