Spectrophotometric Determination of Famciclovir and Racecodotril Using 2, 6‐Dichloroquinone–Chlorimide

A simple, sensitive spectrophotometric method for the determination of Famciclovir and Racecodotril is developed. It is based on the formation of a colored oxidative coupling product between 2,6‐dichloroquinone‐chlorimide and the drug is described. The method has been extended to pharmaceutical preparations. The absorption maxima and Beer’s law limits for Famciclovir are 500 nm, 20‐100 µg/mL and for Racecodotril are 460 nm, 12.5‐62.5 µg/mL.