title: [Determination of diterpene glycosides in coffee (author's transl)].
abstract: The determination of 3'O-beta-D-glucopyranosyl-2'-O-isovaleroyl-2beta-(2-desoxy-atractyligenin)-beta-D-glucopyranoside (KA 1) and 2-O-beta-d-glucopyranosyl-atractyligenin (KA II) in coffee was carried out by liquid/liquid-partition, column chromatography, thin layer chromatography, and photometry. In robusta and arabusta green coffees KA I levels were below the limit of detection, in arabica green coffees between 170 and 460 mg/kg. KA II was present in robusta green coffees between 10 and 45 mg/kg, in arabusta green coffee at about 60 mg/kg, in arabica green coffees between 290 and 340 mg/kg. During roasting these values are reduced, but not during commercial extraction.
mesh_terms: D002853:Chromatography, Liquid; D002855:Chromatography, Thin Layer; D003069:Coffee / Q000032:analysis*; D004224:Diterpenes / Q000032:analysis*; D006027:Glycosides / Q000032:analysis*; D010783:Photometry
chemical_list: D003069:Coffee; D004224:Diterpenes; D006027:Glycosides
vernacular_title: Bestimmung von Diterpen-Glykosiden im Bohnenkaffee.