title: Determination of four polyphenolic active ingredients from a pharmaceutical preparation by capillary zone electrophoresis with amperometric detection.
abstract: The simultaneous determination of four active ingredients in Nao Xue Shuan Tablets, including ferulic acid, protocatechuic aldehyde, caffeic acid and protocatechuic acid was performed by capillary zone electrophoresis with amperometric detection (CZE-AD). The effects of working electrode potential, pH and concentration of running buffer, separation voltage and injection time on CZE-AD were investigated. Under the optimum conditions, the four analytes could be perfectly separated within 18 min. A 300 microm diameter carbon-disc electrode had a good response at +0.95 V (vs. SCE) for the four analytes. The response was linear over three orders of magnitude with detection limits (S/N=3) as low as 10(-8) or 10(-9) g/mL for the analytes. The assay results were satisfactory with recoveries in the range of 85.2-93.0% and RSDs less than 3.3%.
authors.affiliation: Department of Chemistry, East China Normal University, Shanghai 200062, China.
authors.forename: Linlin
authors.initials: L
authors.lastname: Zhang
authors.forename: Shuqing
authors.initials: S
authors.lastname: Dong
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Yang
authors.forename: Qingjiang
authors.initials: Q
authors.lastname: Wang
authors.forename: Pingang
authors.initials: P
authors.lastname: He
authors.forename: Yuzhi
authors.initials: Y
authors.lastname: Fang
mesh_terms: D016588:Anticarcinogenic Agents / Q000032:analysis / Q000737:chemistry; D000925:Anticoagulants / Q000032:analysis / Q000737:chemistry; D000975:Antioxidants / Q000032:analysis / Q000737:chemistry; D001547:Benzaldehydes / Q000032:analysis / Q000737:chemistry; D002021:Buffers; D002109:Caffeic Acids / Q000032:analysis / Q000737:chemistry; D002396:Catechols / Q000032:analysis / Q000737:chemistry; D003373:Coumaric Acids / Q000032:analysis / Q000737:chemistry; D004355:Drug Stability; D004365:Drugs, Chinese Herbal / Q000032:analysis* / Q000737:chemistry; D004563:Electrochemistry; D019075:Electrophoresis, Capillary / Q000379:methods*; D005419:Flavonoids / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D062385:Hydroxybenzoates / Q000032:analysis / Q000737:chemistry; D004364:Pharmaceutical Preparations / Q000032:analysis* / Q000737:chemistry; D010636:Phenols / Q000032:analysis* / Q000737:chemistry; D010936:Plant Extracts / Q000032:analysis / Q000737:chemistry; D059808:Polyphenols; D011208:Powders; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013607:Tablets
chemical_list: D016588:Anticarcinogenic Agents; D000925:Anticoagulants; D000975:Antioxidants; D001547:Benzaldehydes; D002021:Buffers; D002109:Caffeic Acids; D002396:Catechols; D003373:Coumaric Acids; D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D062385:Hydroxybenzoates; D004364:Pharmaceutical Preparations; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols; D011208:Powders; D013607:Tablets; C533099:nao xue shuan; C009091:protocatechuic acid; C005581:protocatechualdehyde; C004999:ferulic acid; C040048:caffeic acid