title: Analysis of carbohydrates in drinks by high-performance liquid chromatography with a dynamically modified amino column and evaporative light scattering detection.
abstract: A high-performance liquid chromatographic method with a dynamically modified amino column and evaporative light-scattering detector (ELSD) was established for the direct analysis of the carbohydrates in some drinks. A separation column (Zorbax Rx-SIL, 250 mm x 4.6 mm I.D., 5 microm, Hewlett-Packard, USA) which was modified by ethylenediamine and a guard column (Zorbax Rx-SIL, 12.5 mm x 4.6 mm I.D., 5 microm) were used. The mobile phase was a mixture of water-acetonitrile (1:2.6, v/v) containing 0.03% (v/v) ethylenediamine. Regression equations revealed linear relationship (correlation coefficients=0.996-0.999) between the mass of carbohydrates injected and the carbohydrates peak areas detected by ELSD. The detection limits of ELSD (S/N=3) were between 0.2 and 1.2 microg for different carbohydrates. This method is simple and sensitive.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Wei
authors.forename: M Y
authors.initials: MY
authors.lastname: Ding
mesh_terms: D001628:Beverages / Q000032:analysis*; D002241:Carbohydrates / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D008027:Light; D012044:Regression Analysis; D012542:Scattering, Radiation
chemical_list: D002241:Carbohydrates