title: Qualitative and quantitative determination of fluoroacetic acid in Arrabidea bilabiata and Palicourea marcgravii by 19F-NMR spectroscopy.
abstract: Qualitative and quantitative examination of Arrabidea bilabiata and Palicourea marcgravii by 19F-NMR spectroscopy has shown the presence of fluoroacetic acid. By acid-base enrichment it is possible to detect amounts of fluoroacetic acid which otherwise are below detection rate. The detection limit (without enrichment) is estimated to be about 4 micrograms/g. Disturbing metal ions of higher oxidation states are also removed by this way. Arrabidea bilabiata contains 64.1 micrograms/g (seeds) and 3.0 micrograms/g (leaves), and Palicourea marcgravii contains 5.4 micrograms/g (leaves).
authors.affiliation: Chemisches Institut der Tierärztliche Hochschule, Hannover, Germany.
authors.forename: H C
authors.initials: HC
authors.lastname: Krebs
authors.forename: W
authors.initials: W
authors.lastname: Kemmerling
authors.forename: G
authors.initials: G
authors.lastname: Habermehl
mesh_terms: D005461:Fluorine; D005463:Fluoroacetates / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010947:Plants, Toxic / Q000737:chemistry*; D012015:Reference Standards; D015203:Reproducibility of Results; D012378:Rodenticides / Q000032:analysis*; D012639:Seeds / Q000737:chemistry
chemical_list: D005463:Fluoroacetates; D010936:Plant Extracts; D012378:Rodenticides; D005461:Fluorine; C014815:fluoroacetic acid