Simultaneous determination of metronidazole and miconazole nitrate in gel by HPTLC.

A new, simple, precise, rapid and selective high-performance thin-layer chromatographic (HPTLC) method for the simultaneous quantification of Metronidazole (MTZ) and Miconazole nitrate (MCZ) in gel has been developed. It was performed on silica gel 60 GF254 Thin Layer Chromatographic plates using mobile phase comprising of Toluene: Chloroform: Methanol (3.0:2.0:0.6 v/v) and the detection was carried out at 240 nm using densitometer. The retention factors of MTZ and MCZ were 0.34 and 0.55 respectively. Calibration curves were linear in the range of 300-700 ng/spot of MTZ and 600-1400 ng/spot of MCZ both by height and by area. The percent recovery of the drugs from gel carried out by standard addition method was found to be 100.13+/-1.59 (by height) and 98.92+/-0.76 (by area) for MTZ and 99.49+/-1.58 (by height) and 99.63+/-1.46 (by area) for MCZ indicative of accuracy and precision of simultaneous determination of MTZ and MCZ nitrate.