LC method for the analysis of Oxiconazole in pharmaceutical formulations

A LC method has been developed for the quantitative determination of Oxiconazole (Ox) in bulk form, lotion and cream pharmaceutical formulations. The method validation yielded good results including the range, linearity, precision, accuracy, recovery, specificity, robustness, limit of quantitation and limit of detection. The LC separation was carried by reversed phase chromatography using a LiChrocart C(8) column (125 mm x 4.0 mm i.d., 5 microm particle size). The mobile phase was composed of methanol-0.02 M ammonium acetate buffer (85:15 v/v), pumped isocratically at flow rate 1 ml min(-1). The detection was carried out on UV detector at 254 nm. The calibration curve for Ox was linear from 40.0-140.0 microg ml(-1) range. The precision of this method, calculated as the relative standard deviation (R.S.D.) was 1.57% for lotion and 0.71% for cream. The R.S.D. values for intra- and inter-day precision studies were 0.57 and 1.34%, respectively. The recovery of the drug ranged between 98.84-102.2% (lotion) and 100.54-101.59% (cream). The stability indicating capability of the assays was proved using forced degradation. Chromatograms showed Ox well resolved from the degradation product.