Determination of Selected Quinolones and Fluoroquinolones by Use of TLC

There are many different methods of quinolones determination. The most often used method of quinolones analysis is liquid chromatography. In this work some selected quinolones (cinoxacin, pipemidic acid) and fluoroquinolones (ofloxacin, pefloxacin) were separated with thin-layer chromatography (TLC). The two different mobile phases were used as follows: buffer solution (pH = 5.5)-methanol, 40:10 (v/v) and acetonitrile-water-acetic acid, 6:40:4 (v/v/v), respectively, for quinolones and fluoroquinolones. The following chromatographic parameters were calculated for these separations: RF, ▵RF, RM, and RS. The possibility of qualitative determination of cinoxacin, pipemidic acid, ofloxacin, and pefloxacin using TLC was shown.