title: Analysis of anthocyanins in powdered berry extracts by planar chromatography linked with bioassay and mass spectrometry.
abstract: Major anthocyanins were extracted with acidified methanol and characterised in powdered berry extracts of bilberry, blueberry, chokeberry, açai berry and cranberry by HPTLC-Vis-MS for the first time. A combined 2-step normal phase separation was applied, first for separation of anthocyanins and secondly of anthocyanidins. Documentation was performed under white light illumination (transmission mode). In the powdered berry extracts, especially the 3-glucosides of delphinidin, cyanidin, malvidin and peonidin, further cyanidin glycosides and respective anthocyanidins were found. Calibration data revealed a good correlation, with r between 0.9988 and 0.9999. The repeatability of the sample analysis (n=3) was ⩽3.6%. Based on the results obtained, this method can be used for rapid routine quality control of powdered berry extracts. For confirmation of the results or characterisation of unknown anthocyanin zones, mass spectra were recorded. Chromatography was directly linked to the effect using DPPH(∗) reagent and luminescent Aliivibrio fischeri bioassay.
authors.affiliation: University Politehnica of Bucharest, Faculty of Applied Chemistry and Material Sciences, Gh. Polizu 1-7, 011061 Bucharest, Romania.
authors.forename: Georgiana C
authors.initials: GC
authors.lastname: Cretu
authors.forename: Gertrud E
authors.initials: GE
authors.lastname: Morlock
mesh_terms: D048908:Aliivibrio fischeri / Q000737:chemistry / Q000378:metabolism; D000872:Anthocyanins / Q000737:chemistry* / Q000378:metabolism; D001681:Biological Assay / Q000379:methods*; D002855:Chromatography, Thin Layer / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry* / Q000378:metabolism; D011208:Powders / Q000737:chemistry* / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D029796:Vaccinium / Q000737:chemistry* / Q000145:classification
chemical_list: D000872:Anthocyanins; D010936:Plant Extracts; D011208:Powders
keywords: Açai berry; Bilberry; Bioassay; Blueberry Chokeberry; Cranberry; Effect-directed analysis (EDA); Mass spectrometry