Reversed-phase high-performance liquid chromatography with differential pulse polarographic detection for assaying drugs in feed: stability-indicating assay of diacetolol.

Reversed-phase high-performance liquid chromatography with differential pulse polarographic detection at a dropping mercury electrode provides a high degree of specificity for stability-indicating assays of drugs in animal feed. The selectivity of this detection system is demonstrated in the assay of diacetolol in feed at concentrations down to 50 microgram/g.