title: Gas-liquid chromatographic detection an determination of diacetyl tartaric acid ester of diglyceride in dairy and nondairy coffee cream powders.
abstract: Diacetyl tartaric acid ester of diglyceride was directly extracted from dairy or nondairy coffee cream powder under acidic conditions with ethyl acetate; then the extract was saponified with methanolic potash. After acidification with HCl, free fatty acid was removed with ether and the reaction mixture was absorbed on an anion exchange column. Tartaric acid was eluted with 2N HCl-acetone (1+1). An aliquot of the trimethylsilyl (TMS) derivative of the eluate was injected into a gas chromatograph with flame ionization detection, and a 1.5% SE-30 column. Recoveries of diacetyl tartaric acid ester of diglyceride at 50, 200, and 2000 ppm were 85.6-99.5%.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D003611:Dairy Products / Q000032:analysis*; D004075:Diglycerides / Q000032:analysis*; D005227:Fatty Acids / Q000302:isolation & purification; D005504:Food Analysis; D005989:Glycerides / Q000032:analysis*; D011189:Potassium Chloride / Q000032:analysis; D013644:Tartrates / Q000032:analysis
chemical_list: D004075:Diglycerides; D005227:Fatty Acids; D005989:Glycerides; D013644:Tartrates; D011189:Potassium Chloride