title: Quantitative thin-layer and high-performance liquid chromatographic determination of the diuretic agent 2-chloro-5-[44-hydroxy-3-methyl-2-(methylimino)-4-thiazolidinyl]benzenesulphonamide hydrochloride in serum and urine.
abstract: Sensitive and specific thin-layer (TLC) and high-performance liquid chromatographic (HPLC) methods were developed for the determination of the diuretic agent 2-chloro-5-[4-hydroxy-3-methyl-2-(methylimino)-4-thiazolidinyl]benzenesulphonamide hydrochloride (HOE 740). HOE 740 can be determined in serum by HPLC. The detection is performed at a very short wavelength (202 nm), resulting in a detection limit of 10 ng/ml. By TLC only urine levels that are normally high can be determined directly (the detection limit is 70 ng/ml). For the determination of the lower serum levels it is necessary to convert the drug into its dehydration product, which has a higher absorbance and gives sufficient sensitivity (the detection limit is 10 ng/ml). Serum levels determined by the two methods correlate well. Some pharmacokinetic and excretion-kinetic data were computed using two-compartment open models.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002855:Chromatography, Thin Layer / Q000379:methods; D004232:Diuretics / Q000097:blood* / Q000652:urine; D006801:Humans; D008832:Microchemistry; D013449:Sulfonamides / Q000097:blood* / Q000652:urine; D053778:Thiazolidines; D000096926:Benzenesulfonamides
chemical_list: D004232:Diuretics; D013449:Sulfonamides; D053778:Thiazolidines; C023449:tizolemide; D000096926:Benzenesulfonamides