胶束电动色谱法同时测定十种食品中的十种防腐剂
Simultaneous determination of ten preservatives in ten kinds of foods by micellar electrokinetic chromatography.
作者信息
Ding Xiao-Jing, Xie Na, Zhao Shan, Wu Yu-Chen, Li Jiang, Wang Zhi
机构信息
Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, Beijing 100013, China; Department of Public Health, Capital Medical University, Beijing 100069, China.
Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, Beijing 100013, China; College of Science, Agricultural University of Hebei, Baoding 071001, China.
出版信息
Food Chem. 2015 Aug 15;181:207-14. doi: 10.1016/j.foodchem.2015.02.060. Epub 2015 Feb 24.
An improved micellar electrokinetic capillary chromatography method (MEKC) for the simultaneous determination of ten preservatives in ten different kinds of food samples was reported. An uncoated fused-silica capillary with 50 μm i.d. and 70 cm total length was used. Under the optimized conditions, the linear response was observed in the range of 1.2-200mg/L for the analytes. The limits of detection (LOD, S/N=3) and limits of quantitation (LOQ, S/N=10) ranging from 0.4 to 0.5mg/L and 1.2 to 1.5mg/L, respectively were obtained. The method was used for the determination of sorbic and benzoic acids in two FAPAS® (Food Analysis Performance Assessment Scheme) proficiency test samples (jam and chocolate cake). The results showed that the current method with simple sample pretreatment and small reagent consumption could meet the needs for routine analysis of the ten preservatives in ten types of food products.
报道了一种改进的胶束电动毛细管色谱法（MEKC），用于同时测定十种不同食品样品中的十种防腐剂。使用内径为50μm、总长为70cm的未涂层熔融石英毛细管。在优化条件下，分析物在1.2 - 200mg/L范围内呈线性响应。分别获得了0.4至0.5mg/L的检测限（LOD，S/N = 3）和1.2至1.5mg/L的定量限（LOQ，S/N = 10）。该方法用于测定两个FAPAS®（食品分析性能评估计划）能力验证样品（果酱和巧克力蛋糕）中的山梨酸和苯甲酸。结果表明，该方法样品前处理简单、试剂消耗少，能够满足十种食品中十种防腐剂的常规分析需求。
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