A simple and rapid liquid chromatographic method for the determination of metronidazole and its hydroxymetabolite in plasma and cutaneous microdialysates.

A rapid, accurate, simple and low-cost method for quantitative determination of metronidazole and its hydroxymetabolite, in plasma and microdialysate samples, using tinidazole as an internal standard, has been developed. Metronidazole is widely used as a valuable agent for antiprotozoal as well as antibiotic therapy when anaerobic organisms are involved. Separation of the compounds studied was performed on a 120 x 4 mm analytical column, filled with LiChrosorb RP-8, 5 microm, the mobile phase consisted of 0.