在线固相萃取-高效液相色谱检测饮料中5种食用合成色素
Journal of Instrumental Analysis(2016)
Abstract
建立了同时测定饮料中5种食用合成色素的在线固相萃取-高效液相色谱-紫外检测(Online-SPE -HPLC-UV)方法.饮料样品用水稀释并经0.45 μm微孔滤膜过滤后,在线固相萃取柱(Acclaim 120 C18)净化,反相C18分析柱分离,梯度洗脱,紫外检测器检测.结果表明:5种食用合成色素在0.5 ~ 20 mg/L浓度范围内线性关系良好,相关系数(r2)均大于0.999 9,检出限为0.02~0.08 mg/kg,3个水平下的加标回收率为94.5% ~ 103.0%,相对标准偏差为0.4%~2.7%.该研究为快速准确地分离测定饮料中的食用合成色素提供了有效方法.
MoreKey words
online solid-phase extraction,edible synthetic pigments,drinks,high performance liquid chromatography (HPLC)
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