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Determination of trace vanadium by catalytic spectrophotometry with methyl Green-V(V)-KBrO_3

Aixiang Wang

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Abstract

A new spectrophotometric method for the determination of trace amount of Vanadium was developed. It is based on the catalytic effect of trace vanadium on the discoloring oxidation of methyl green by KBrO_3 in the presence of Vc in the medium of H_3PO_4. The optimum conditions of the catalytic reation have been studied. The linear range of Ⅴ(V) is 0～1.00 ng/10 mL, and the detection limit is 5.20×10~(-12) g/mL. The method has been used for the determination of trace Vanadium in celery and wheat with satisfactory results.

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What this paper is about

A new spectrophotometric method for the determination of trace amount of Vanadium was developed. It is based on the catalytic effect of trace vanadium on the discoloring oxidation of methyl green by KBrO_3 in the presence of Vc in the medium of H_3PO_4. The optimum conditions of the catalytic reation have been studied. The linear range of Ⅴ(V) is 0～1.00 ng/10 mL, and the detection limit is 5.20×10~(-12) g/mL. The method has been used for the determination of trace Vanadium in celery and wheat with satisfactory results.

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Available abstract

A new spectrophotometric method for the determination of trace amount of Vanadium was developed. It is based on the catalytic effect of trace vanadium on the discoloring oxidation of methyl green by KBrO_3 in the presence of Vc in the medium of H_3PO_4. The optimum conditions of the catalytic reation have been studied. The linear range of Ⅴ(V) is 0～1.00 ng/10 mL, and the detection limit is 5.20×10~(-12) g/mL. The method has been used for the determination of trace Vanadium in celery and wheat with satisfactory results.

Key concepts: Chemistry, Vanadium, Detection limit, Catalysis, Spectrophotometry, Linear range, TRACE (psycholinguistics), Nuclear chemistry

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