title: Determination of hydrolyzable tannins in the fruit of Terminalia chebula Retz. by high-performance liquid chromatography and capillary electrophoresis.
abstract: A RP-HPLC method for determining fourteen components (gallic acid, chebulic acid, 1,6-di-O-galloyl-D-glucose, punicalagin, 3,4,6-tri-O-galloyl-D-glucose, casuarinin, chebulanin, corilagin, neochebulinic acid, terchebulin, ellagic acid, chebulagic acid, chebulinic acid, and 1,2,3,4,6-penta-O-galloyl-D-glucose) in the fruit of Terminalia chebula Retz. is described. The separation was achieved within 80 min using a binary gradient with mobile phases consisting of a pH 2.7 phosphoric acid solution and an 80% CH3CN solution. Capillary electrophoretic analyses were also attempted, and it was found that CZE (25 mM Na2B4O7, 5 mM NaH2PO4, pH 7.0) was an efficient method for the separation of gallotannins, while an MEKC method (25 mM Na2B4O7, 5 mM NaH2PO4, 20 mM SDS, pH 7.0, and 10% acetonitrile) provided a better separation for most of the tannins examined. The HPLC and CE methods developed were both successfully applied to the assay of tannins in commercial samples of Chebulae Fructus.
authors.affiliation: Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei, Taiwan, ROC.
authors.forename: Lih-Jeng
authors.initials: LJ
authors.lastname: Juang
authors.forename: Shuenn-Jyi
authors.initials: SJ
authors.lastname: Sheu
authors.forename: Ta-Chen
authors.initials: TC
authors.lastname: Lin
mesh_terms: D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D006868:Hydrolysis; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013634:Tannins / Q000032:analysis*; D029766:Terminalia / Q000033:anatomy & histology / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D013634:Tannins