微波消解-电感耦合等离子体质谱法同时测定沙棘汁饮料中18种无机元素

目的建立微波消解-电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)同时测定沙棘汁饮料中18种无机元素的方法。方法采用微波消解法对沙棘汁饮料样品进行处理,采用ICP-MS法测定,对前处理过程和仪器条件进行了优化,对方法性能进行考察,并将该方法用于4批市售沙棘汁样品中18种元素含量的检测。结果该方法线性范围宽,线性关系良好(r0.995),精密度高,18种元素的加标回收率为96.4%～107.3%,相对标准偏差(relative standard deviation, RSD)为0.3%～5.9%。结论微波消解-ICP-MS法前处理过程简单,分析时间短,方法快速、准确、可靠,能够满足沙棘汁中多种元素同时检测的需要。

Simultaneous determination of 18 kinds of inorganic elements in sea-buckthorn juice by microwave digestion-inductively coupled plasma mass-spectrometry

Objective To establish a method for simultaneous determination of 18 kinds of inorganic elements in sea-buckthorn juice by microwave digestion-inductively coupled plasma-mass spectrometry (ICP-MS). Methods The sea-buckthorn juice beverage samples were processed by microwave digestion method, then determined by ICP-MS, and the pretreatment process and instrument conditions were optimized. The performance of the method was examined, and the method was applied to detect 18 kinds of inorganic elements in 4 batches of commercially available sea-buckthorn juice samples. Results The method had a wide linear range, good linearity (r>0.995), high precision, the recoveries of 18 kinds of inorganic elements were 96.4%-107.3%, and the relative standard deviations (RSDs) were 0.3%-5.9%. Conclusion This method has a simple pretreatment process and a short analysis time. It is fast, accurate and reliable, and is suitable for simultaneous determination of various elements in sea-buckthorn juice.