Solubility of antimycotics: a problem in in vitro experiments.
An investigation of how miconazole nitrate dissolved in dimethylformamide in initial concentrations of 1,000, 500, and 100 microgram/ml may alter its concentration with storage time, is presented. The determination of miconazole nitrate was performed with high pressure liquid chromatography. After 8 hours the 1,000 microgram/ml solution was milky and the concentration of miconazole had fallen significantly. It was concluded that test agar plates or agar tubes must be made with freshly prepared and clear stock solutions, otherwise false MIC's may be obtained.
D004126:Dimethylformamide; D004356:Drug Storage; D007093:Imidazoles; D008825:Miconazole; D008826:Microbial Sensitivity Tests; D012995:Solubility
D007093:Imidazoles; D008825:Miconazole; D004126:Dimethylformamide