title: A new method for simultaneous determination of bile acids in human bile without hydrolysis.
abstract: A method for simultaneous determination of major bile acids in human bile without prior hydrolysis is described. The unconjugated, glycine- and taurine-conjugated bile acids are separated into groups by ion-exchange chromatography on a newly developed lipophilic gel, piperidinohydroxypropyl Sephadex LH-20 (PHP-LH-20). Subsequently, resolution of each group into cholate, ursodeoxycholate, chenodeoxycholate, deoxycholate and lithocholate is attained into two stages by high-performance liquid chromatography on a micron-Bondapak C18 column. First, 0.3% ammonium carbonate/acetonitrile (9 : 4, v/v) is used for separation of the latter three as a mobile phase. Cholate and ursodeoxycholate are separated in 0.3% ammonium carbonate/acetonitrile (11 : 4, v/v). The present method is applicable to quantitation of free and conjugated bile acids in human bile with satisfactory accuracy and precision.
mesh_terms: D001646:Bile / Q000032:analysis*; D001647:Bile Acids and Salts / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D005069:Evaluation Studies as Topic; D006801:Humans; D008722:Methods
chemical_list: D001647:Bile Acids and Salts