Reversed phase high performance liquid chromatographic determination of cefixime in bulk drugs

A new technique for the quantitative determination of cefixime trihydrate i n bulk drugs by high performance liquid chromatography was developed using simple reagents. Finally, chosen conditions of analysis were as follows: Li Chrospher 100 RP - 18 (250 x 4 mm I.D.) column, mobile phase consisting of phosphate buffer pH 7.0 and acetonitrile (93:7, v/v), flow rate of 0,8 mL/m in, loop of 20 muL and UV detection at 287 nm. The prospective validation o f this technique showed that it is linear in a range of 0.1 to 0.6 mg/mL (r = 0.9997), sensitive (0.3 %), precise (within-a-day repeatability, RSD = 1 .0 %, day-to-day repeatability RSD = 1.3 %), accurate and selective (cefixi me can be determined in presence of its related compounds). The limits of d etection and quantitation are 37 ng (0.3 %) and 128 ng (1.1 %), respectivel y, relative to a 0.6 mg/mL solution.