title: Ammonium positive-ion and hydroxide negative-ion chemical ionization gas chromatography-mass spectrometry for the identification of pyrrolizidine alkaloids in Eupatorium rotundifolium L. var. ovatum.
authors.affiliation: Laboratory of Pharmacognosy, State University Groningen, The Netherlands.
authors.forename: H
authors.initials: H
authors.lastname: Hendriks
authors.forename: H J
authors.initials: HJ
authors.lastname: Huizing
authors.forename: A P
authors.initials: AP
authors.lastname: Bruins
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D006878:Hydroxides / Q000032:analysis; D010946:Plants, Medicinal / Q000032:analysis*; D011763:Pyrrolizidine Alkaloids / Q000032:analysis*; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D014297:Trimethylsilyl Compounds / Q000032:analysis
chemical_list: D006878:Hydroxides; D011763:Pyrrolizidine Alkaloids; D000644:Quaternary Ammonium Compounds; D014297:Trimethylsilyl Compounds