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2000•Journal of Analytical ScienceRequires access

A Study on the Spectrophotometric Determination of Copper in the Biological Samples and Aluminum Alloys with a New Chromogenic Reagent HBPCF

Xu Ye

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Abstract

A chromogenic reaction of copper with a new chromogenic reagent, 1,5 (2 hydroxy 5 bromophenyl) 3 cyanoformazan (HBPCF) is studied in this paper. In pH=3.6 HAc NaAc medium, Cu(Ⅱ) reacts with the reagent to form a blue complex which exhibits an absorption maximum at 630 nm with a molar absorptivity of 2.8×10 4 L·mol -1 ·cm -1 .Beer's law is obeyed for 0~25 μg of copper in 25 mL of solution. The reagent which possesses excellent selectivity in this condition has been applied to the determination of micro amounts of copper in tea, green gram and aluminum alloys with satisfactory results.

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What this paper is about

A chromogenic reaction of copper with a new chromogenic reagent, 1,5 (2 hydroxy 5 bromophenyl) 3 cyanoformazan (HBPCF) is studied in this paper. In pH=3.6 HAc NaAc medium, Cu(Ⅱ) reacts with the reagent to form a blue complex which exhibits an absorption maximum at 630 nm with a molar absorptivity of 2.8×10 4 L·mol -1 ·cm -1 .Beer's law is obeyed for 0~25 μg of copper in 25 mL of solution. The reagent which possesses excellent selectivity in this condition has been applied to the determination of micro amounts of copper in tea, green gram and aluminum alloys with satisfactory results.

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Available abstract

A chromogenic reaction of copper with a new chromogenic reagent, 1,5 (2 hydroxy 5 bromophenyl) 3 cyanoformazan (HBPCF) is studied in this paper. In pH=3.6 HAc NaAc medium, Cu(Ⅱ) reacts with the reagent to form a blue complex which exhibits an absorption maximum at 630 nm with a molar absorptivity of 2.8×10 4 L·mol -1 ·cm -1 .Beer's law is obeyed for 0~25 μg of copper in 25 mL of solution. The reagent which possesses excellent selectivity in this condition has been applied to the determination of micro amounts of copper in tea, green gram and aluminum alloys with satisfactory results.

Key concepts: Chromogenic, Reagent, Chemistry, Molar absorptivity, Copper, Selectivity, Aluminium, Absorption (acoustics)

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A Study on the Spectrophotometric Determination of Copper in the Biological Samples and Aluminum Alloys with a New Chromogenic Reagent HBPCF — Research Paper | ScholarLens