title: Analysis of coptisine, berberine and palmatine in adulterated Chinese medicine by capillary electrophoresis-electrospray ion trap mass spectrometry.
abstract: Chinese medicine preparations contaminated with coptisine, berberine and palmatine were studied by capillary electrophoresis-electrospray ion trap mass spectrometry. The dubious adulterants were identified by their retention times, molecular ions and specific fragment ions produced from collision induced dissociation. The results showed that, in comparison with CE-UV and capillary electrophoresis-electrospray mass spectrometry (CE-ESI-MS), more reliable identification could be achieved with CE-ESI-MS-MS using ion trap mass spectrometry.
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei.
authors.forename: Y R
authors.initials: YR
authors.lastname: Chen
authors.forename: K C
authors.initials: KC
authors.lastname: Wen
authors.forename: G R
authors.initials: GR
authors.lastname: Her
mesh_terms: D001599:Berberine / Q000031:analogs & derivatives* / Q000032:analysis*; D001600:Berberine Alkaloids / Q000032:analysis*; D004340:Drug Contamination; D019075:Electrophoresis, Capillary / Q000379:methods; D013058:Mass Spectrometry / Q000379:methods; D008516:Medicine, Chinese Traditional; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001600:Berberine Alkaloids; C034384:coptisine; D001599:Berberine; C005413:palmatine