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Merck

Chromatographic detection of captopril using 4-dimethylaminobenzaldehyde as spray reagent.

Bollettino chimico farmaceutico (2001-10-30)
U Ajali, B K Chukwurah
ABSTRACT

Thin layer chromatographic method, using a mixture of acetone:ethanol in the ratio of 9:1 as a developing solvent system, was used to detect captopril in its formulation. The developed chromatogram was sprayed with 4-dimethylaminobenzaldehyde. The product formed by reaction of captopril with 4-dimethylaminobenzaldehyde gave a yellow colour. Rf of captopril is 0.56.

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