title: High performance liquid chromatographic analysis of selected sulfonamides in plasma.
abstract: Chromatographic conditions were elaborated to evaluate a model mixture of four sulfonamides (sulfamethoxazole, sulfamoxole, sulfisoxazole and sulfamethoxydiazine) in plasma using a reversed phase HPLC C18 column and a mobile phase composed of methanol and phosphate buffer (60:40; v/v) at pH 5.0. The detection was made using an electrochemical detection with the potential set at 1.1 V. In the case of sulfonamides deproteination of plasma with methanol was more advantageous than extraction with organic solvents. The recovery of analysed sulfonamides was in the range of 95-97%, the detection limits were 10 ng/ml of plasma.
authors.affiliation: Department of Pharmaceutical Chemistry and Drug Control, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Klimes
authors.forename: M
authors.initials: M
authors.lastname: Mokrý
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D013449:Sulfonamides / Q000097:blood*
chemical_list: D013449:Sulfonamides