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Abstract

Spectrophotometric method for the determination of pentazocine and mefenamic acid.

Author(s): C SP Sastry, A RM Rao
Foods and Drugs Laboratories, School of Chemistry, Andhra University, Waltair

Correspondence Address:
C SP Sastry Foods and Drugs Laboratories, School of Chemistry, Andhra University, Waltair

A rapid method for the determination of microgram quantities of pentazocine and mefenamic acid in dosage forms has been proposed, based on their ability to form a water-soluble coloured complex with sodium nitroprusside and hydroxyl-ammonium chloride. The intensities of the coloured species were measured at 750 nm and 620 nm respectively.