高效液相色谱-串联质谱法同时检测非蛋白饮料中30种食品添加剂
Simultaneous Determination of 30 Food Additives in Non-protein Beverages by High Performance Liquid Chromatography-tandem Mass Spectrometry
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摘要: 建立非蛋白饮料中30种食品添加剂的高效液相色谱-串联质谱分析方法。样品直接加入50%甲醇溶液,超声提取5 min后经0.22 μm聚四氟乙烯(Polytetrafluoroethylene,PTFE)滤膜过滤,滤液直接上机进行检测。在电喷雾电离模式下采用多反应监测模式进行测定。结果表明,30种食品添加剂在20~1000 ng/mL范围内线性良好,线性相关系数大于0.990。该方法的检出限为29~441 μg/kg,空白样品加标回收率在73.50%~117.60%,精密度为0.35%~15.37%。该方法简单、快速、灵敏,可以作为非蛋白饮料中多类添加剂的快速筛查和确证方法。Abstract: A high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS) method for simultaneous determination of 30 food additives in non-protein beverages was developed. 50% methanol liquid was directly added to the weighed sample,which was extracted by ultrasonic for 5 min and then filtered by polytetrafluoroethylene(PTFE) filter membrane. The filtrate was directly put on the machine for detection. Mass spectral data were acquired under electro spray ion(ESI) mode using multiple reaction monitoring(MRM) scan function. Results showed that,an excellent linear relationship in the range of 20~1000 ng/mL was observed for all the analytes with a correlation coefficient larger than 0.990. The limits of detection were 29~441 μg/kg.The average recoveries from spiked blank samples ranged from 73.50% to 117.60% with relative standard deviation between 0.35% and 15.37%. The method was rapid,sensitive and easy to apply,and suitable for the simultaneous determination and confirmation of various type additives in non-protein beverages.