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Differential-pulse polarography (DPP) determination of betamethasone valerate in dosage form.

作者信息

Belgaied J-E

机构信息

Institut National des Sciences Appliquées et de Technologies, B.P. 676, 1080, Tunis Cedex, Tunisia.

出版信息

Anal Bioanal Chem. 2003 Jul;376(5):706-9. doi: 10.1007/s00216-003-1959-1. Epub 2003 May 21.

DOI:10.1007/s00216-003-1959-1
PMID:12759798
Abstract

The electrochemical reduction of betamethasone valerate (BV) in a pharmaceutical formulation containing neomycin has been carried out in Britton-Robinson buffer (BRB) (0.04 mol L(-1)) by differential-pulse polarography (DPP). BV exhibits a well-defined irreversible reduction peak at -1.03 V/ref. The influence of pH on the reduction of BV was studied in Britton-Robinson buffer (pH range 1.7-10). A method for the analysis of BV in BRB (0.04 mol L(-1)), which allows quantification over the range 3.9x10(-6)-1.1x10(-4) mol L(-1), was proposed and successfully applied to the determination of BV in tablets with mean recovery and relative standard deviation of 100.81% and 0.45%, respectively.

摘要

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