C18 columns for the simultaneous determination of oxytetracycline and its related substances
Simultaneous determination of oxytetracycline, 4-epioxytetracycline, ?-apooxytetracycline, tetracycline and ?-apooxytetracycline on C18 columns has been accomplished using a high performance liquid chromatographic method with UV detection. Separation was achieved on a Hypersil BDS RP-C18 column (250 mm