title: High pressure liquid chromatographic determination of xanthomegnin in grains and animal feeds.
abstract: A high pressure liquid chromatographic (HPLC) method is described for the determination of xanthomegnin in grains and mixed animal feeds at levels ranging from 150 to 1200 ng/g. This is equivalent to actual amounts of xanthomegnin injected on the HPLC system at from 15 to 120 ng/injection. Xanthomegnin is extracted with chloroform and 0.1M phosphoric acid. An aliquot of the crude extract is purified by column chromatography using a commercially available silica gel cartridge. Xanthomegnin is then separated from the remaining interferences by HPLC with a reverse phase C-8 column, and subsequently determined by absorbance detection at 405 nm. Elapsed time for the method from initial extraction to final HPLC determination is approximately 1 h. Recoveries of xanthomegnin added to grains and animal feeds at levels from 150 to 1200 ng/g averaged 82% with a coefficient of variation of 10.2%.
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D002523:Edible Grain / Q000032:analysis*; D009285:Naphthoquinones / Q000032:analysis*
chemical_list: D009285:Naphthoquinones; C009688:xanthomegnin