Schieffer G W
J Chromatogr. 1980 Dec 26;202(3):405-12. doi: 10.1016/s0021-9673(00)91825-9.
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.