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2003•Physical Testing and Chemical AnalysisRequires access

PHOTOMETRIC DETERMINATION OF BISMUTH IN DRUGS WITH CPA-DBF

Yang Hao-yi

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Abstract

In a mixed acid medium of 0.36mol·L -1 H_2SO_4-0.60mol·L -1 H_3PO_4, bismuth(Ⅲ) reacts with CPA-DBF to form a blue complex, having its absorption maxima at 638nm and an apparent molar absorptivity of 9.4×10 4L·mol -1 ·cm -1 . Beer′s law holds in the concentration range of 0~30μg of Bi(Ⅲ) per 25ml of solution. The proposed method has been applied to the determination of bismuth in some drug samples, e.g. colloidal bismuth pectin capsule, bismuth potassium citrate granules etc.

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What this paper is about

In a mixed acid medium of 0.36mol·L -1 H_2SO_4-0.60mol·L -1 H_3PO_4, bismuth(Ⅲ) reacts with CPA-DBF to form a blue complex, having its absorption maxima at 638nm and an apparent molar absorptivity of 9.4×10 4L·mol -1 ·cm -1 . Beer′s law holds in the concentration range of 0~30μg of Bi(Ⅲ) per 25ml of solution. The proposed method has been applied to the determination of bismuth in some drug samples, e.g. colloidal bismuth pectin capsule, bismuth potassium citrate granules etc.

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Available abstract

In a mixed acid medium of 0.36mol·L -1 H_2SO_4-0.60mol·L -1 H_3PO_4, bismuth(Ⅲ) reacts with CPA-DBF to form a blue complex, having its absorption maxima at 638nm and an apparent molar absorptivity of 9.4×10 4L·mol -1 ·cm -1 . Beer′s law holds in the concentration range of 0~30μg of Bi(Ⅲ) per 25ml of solution. The proposed method has been applied to the determination of bismuth in some drug samples, e.g. colloidal bismuth pectin capsule, bismuth potassium citrate granules etc.

Key concepts: Bismuth, Molar absorptivity, Chemistry, Absorption (acoustics), Nuclear chemistry, Potassium, Capsule, Chromatography

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