微波消解-电感耦合等离子体质谱法同时测定山楂汁饮料中20种无机元素

Simultaneous determination of 20 kinds of inorganic elements in hawthorn juice by microwave digestion-inductively coupled plasma mass spectrometry

中文关键词:  山楂汁饮料  微波消解  电感耦合等离子体质谱法  无机元素

英文关键词:hawthorn juice  microwave digestion  inductively coupled plasma mass spectrometry  inorganic element

中文摘要:

      目的 建立微波消解-电感耦合等离子体质谱法同时测定山楂汁饮料中20种无机元素的分析方法。方法 用微波消解法对山楂汁饮料样品进行处理, 采用电感耦合等离子体质谱法, 通过在线添加内标进行校正的方式对样品进行测定, 优化前处理方法和仪器参数条件, 对方法学进行考察, 最后采用该方法测定4批市售山楂汁饮料中20种无机元素的含量。结果 该方法在一定线性范围内, 线性关系良好, 相关系数均大于0.9980, 检出限为0.00001~0.07 mg/L, 精密度为0.9%~3.1%(n=6), 平均回收率在84.6%~107.1%之间。结论 该方法灵敏、可靠、便捷, 适合山楂汁饮料中多种无机元素的检测。

英文摘要:

      Objective To establish a method for the simultaneous determination of 20 kinds of inorganic elements in hawthorn juice by microwave digestion-inductively coupled plasma mass spectrometry(ICP-MS). Methods The hawthorn juice samples were processed by microwave digestion method, and then determined by ICP-MS with on-line calibration by adding internal standard, the pre-treatment method and the instrument parameters were optimized, the methodology was investigated, and the method was used to determine 20 kinds of inorganic elements in 4 batches of commercially available hawthorn juice beverages. Results This method had good linearity in a certain range. The correlation coefficients were higher than 0.9980, the detection limits were 0.00001?0.07 mg/L, the precisions were in the range of 0.9%?3.1%(n=6), and the recoveries were in the range of 84.6%?107.1%. Conclusion This method is sensitive, reliable and convenient, and is suitable for the determination of various inorganic elements in hawthorn juice beverage.