离子迁移谱法测定饮料中的糖精钠和痕量马来酸

Ion mobility spectrometry for the detection of sodium saccharin and trace maleic acid in beverages

中文关键词:  离子迁移谱  饮料  糖精钠  马来酸

英文关键词:ion mobility spectrometry with direct electrospray ionization  beverages  sodium saccharin  maleic acid

中文摘要:

      目的 利用电喷雾-高效离子迁移谱(ESI-HPIMS)对饮料中常见的甜味剂糖精钠和有可能残存的痕量马来酸进行检测。方法 通过在饮料中加入糖精钠和马来酸标准品来模拟添加剂存留情况, 添加后的饮料经简单的稀释, 过滤等前处理, 直接进样即可测定。结果 研究结果表明, 仪器对糖精钠和马来酸标准品的灵敏度达到了10-10数量级, 最低检出限为0.1 ng/μL, 6组平行数据的相对标准偏差(RSD)在1.2%~7.2%, 线性相关系数均达到了r2大于0.99, 单次测量时间低于10 s。 结论 实现了糖精钠和痕量马来酸的快速分析检测。

英文摘要:

      Objective Saccharin sodium and possible remaining maleic acid in beverages were detected by high performance ion mobility spectrometry with direct electrospray ionization (ESI-HPIMS). Methods By adding saccharin sodium and maleic acid standards into beverages to simulate real situation, the beverages were diluted, filtered, samples were injected into IMS directly. Results The research showed that the sensi-tivity of the instrument for saccharin sodium and maleic acid could reach 10-10 with detection of minimum standard 0.1 ng/?L, the relative standard deviation (RSD) of 6 parallel data was in the range of 1.2%~7.2%, with linear correlation coefficients r2>0.99. The single detection time was less than 10 s. Conclusion This method can achieve a rapid analysis of sodium saccharin and trace maleic acid.