P. Blain et al., OPTIMIZATION OF THE HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY ASSAY FOR VIRGINIAMYCIN DETERMINATION IN MINERAL PREMIXES, Analyst, 119(2), 1994, pp. 361-364
An optimized reversed phase high-performance liquid chromatography met
hod for the determination of virginiamycin in mineral premixes is pres
ented. It consists of an extraction of the active components with a mi
xture of acetone and citric acid (0.5 mol l(-1)), supplemented with 2%
thioacetamide, followed by centrifugation or filtration and dilution
in acetonitrile-water (1 + 1). The validation shows that the method is
reproducible, precise, repeatable and linear between 5 and 50 mu g ml
(-1) of virginiamycin activity.