色谱2012，Vol.30Issue(5)：538-542,5.DOI:10.3724/SP.J.1123.2011.12013
聚合离子液体为添加剂的毛细管电泳法用于快速高效分离饮料中7种有机酸
Highly efficient and rapid capillary electrophoretic analysis of seven organic acid additives in beverages using polymeric ionic liquid as additive
摘要
Abstract
A new capillary electrophoretic method for the rapid and direct separation of seven organic acids in beverages was developed, with poly( l-vinyl-3-butylimidazolium bromide) as the reliable background electrolyte modifier to reverse the direction of anode electroosmotic flow (EOF) severely. Several factors that affected the separation efficiency were investigated in detail. The optimal running buffer consisted of 125 mrnol/L sodium dihydrogen phosphate (pH6. 5) and 0.01 g/L poly(l-vinyl-3-butylimidazolium bromide). Highly efficient separation ( 105 000 to 636 000 plates/m) was achieved within 4 min and standard deviations of the migration times (n =3) were lower than 0. 0213 min under optimal conditions. The limits of detection (S/JV = 3) ranged from 0. 001 to 0. 05 g/L. The present method was applied to determine a beverage sample (Mirinda) for sodium citrate, benzoic acid and sorbic acid with concentration of 2. 64, 0. 10 and 0.08 g/L, respectively. The recoveries of the three analytes in the sample were 100.3%, 100.7% and 131.7%, respectively. The method is simple, rapid, inexpensive, and can be applied to determine organic acids as additives in beverages.关键词
毛细管电泳/有机酸/饮料/聚合离子液体/阳极电渗流Key words
capillary electrophoresis (CE) / organic acids/ beverage/ polymeric ionic liquid/anode electroosmotic flow分类
化学化工引用本文复制引用
韩海峰,王庆,刘霞,蒋生祥..聚合离子液体为添加剂的毛细管电泳法用于快速高效分离饮料中7种有机酸[J].色谱,2012,30(5):538-542,5.基金项目
国家自然科学基金项目(20875096). （20875096）
