Simultaneous Determination of 11 Food Additives by Micellar Electrokinetic Capillary Chromatography

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• 作者：Yuchen Wu ; Jiang Li ; Shan Zhao ; Xiaojing Ding
• 关键词：MEKC ; Sweetener ; Preservative ; Caffeine ; Quinine
• 刊名：Food Analytical Methods
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：9
• 期：3
• 页码：589-595
• 全文大小：423 KB
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• 作者单位：Yuchen Wu (1) (2)
  Jiang Li (2)
  Shan Zhao (2)
  Xiaojing Ding (1) (2)
  
  1. Department of Public Health, Capital Medical University, Beijing, 100069, China
  2. Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, No. 16, He Pingli Zhongjie, Dongcheng District, Beijing, 100013, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Food Science
  Chemistry
  Microbiology
  Analytical Chemistry
  
• 出版者：Springer New York
• ISSN：1936-976X

文摘

A micellar electrokinetic chromatographic (MEKC) method was developed for simultaneous determination of 11 food additives which are commonly used in beverage, yogurt, and candied fruit samples. An uncoated fused-silica capillary with 50 μm i.d. and 70 cm total length (effective length: 60 cm) was used for the separation. The separation buffer consisted of 20 mmol/L sodium tetraborate, 42 mmol/L boric acid (pH 8.83), and 100 mmol/L sodium deoxycholate. The separation voltage was 23 kV, and the detection wavelength was 214 nm. The limits of detection were in the ranges of 0.25 to 2.5 mg/L. The corrected peak areas (Ac) and the concentrations of the 11 additives showed linear relationships within the ranges of 0.6–400 mg/L with linear correlation coefficients (r) above 0.99. The recoveries ranging from 81.6 to 115.0 % with relative standard deviations (RSDs) all lower than 5 % were obtained, which demonstrated the accuracy of the proposed method. A Food Analysis Performance Assessment Scheme (FAPAS®) proficiency test sample was analyzed. The results showed that the current method with simple sample pretreatment could meet the needs for routine analysis of the 11 additives in beverage, yogurt, and candied fruit samples. Keywords MEKC Sweetener Preservative Caffeine Quinine