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Spectrophotometric determination of trace molybdenum in medicines withdimethoxyhydroxyphenylflurone(DMHPF)

Pan Jiao-mai

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Abstract

A spectrophotometric method for determination of trace molybdenum with a chromogenic reagent DMHPF was studied.In H_2SO_4-H_3PO_4 medium,molybdenum formed an orange-red 1∶2 complex with DMHPF in the presence of Triton X-100,which had absorbance maximum at 526 nm.The apparent molar absorptivity is 1.4×10~5L·mol~(-1)·cm~(-1).Beer' law was obeyed for molybdenum in the range of 0～10μg/25ml.Most of other metal ions do not interfere with the determination.The present method was used to determine trace molybdenum in medicinal tablets with satisfactory results.

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A spectrophotometric method for determination of trace molybdenum with a chromogenic reagent DMHPF was studied.In H_2SO_4-H_3PO_4 medium,molybdenum formed an orange-red 1∶2 complex with DMHPF in the presence of Triton X-100,which had absorbance maximum at 526 nm.The apparent molar absorptivity is 1.4×10~5L·mol~(-1)·cm~(-1).Beer' law was obeyed for molybdenum in the range of 0～10μg/25ml.Most of other metal ions do not interfere with the determination.The present method was used to determine trace molybdenum in medicinal tablets with satisfactory results.

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Available abstract

A spectrophotometric method for determination of trace molybdenum with a chromogenic reagent DMHPF was studied.In H_2SO_4-H_3PO_4 medium,molybdenum formed an orange-red 1∶2 complex with DMHPF in the presence of Triton X-100,which had absorbance maximum at 526 nm.The apparent molar absorptivity is 1.4×10~5L·mol~(-1)·cm~(-1).Beer' law was obeyed for molybdenum in the range of 0～10μg/25ml.Most of other metal ions do not interfere with the determination.The present method was used to determine trace molybdenum in medicinal tablets with satisfactory results.

Key concepts: Molybdenum, Molar absorptivity, Absorbance, Chromogenic, Reagent, Chemistry, Trace Amounts, Spectrophotometry

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Spectrophotometric determination of trace molybdenum in medicines withdimethoxyhydroxyphenylflurone(DMHPF) — Research Paper | ScholarLens