电感耦合等离子体质谱法测定果酒中微量元素的含量

建立了果酒中钠、钾、钙等21种微量元素电感耦合等离子体质谱(ICP-MS)测定的分析方法。样品经微波消解后用ICP-MS进行分析。优化实验条件下,21种元素的线性范围为0～10μg/mL,线性关系良好,相关系数均大于0.999,方法的检出限为0.020～5.331ng/mL,相对标准偏差(n=6)为0.6%～4.8%,添加水平为0.001～3000μg/g时,果酒样品中的21种元素平均加标回收率为89.7%～112%。方法具有简单、快速和准确的特点,是一种简便、快速分析果酒中无机元素的方法。

Determination of Trace Elements in Fruit Wine by Inductively Coupled Plasma Mass Spectrometry

A method was established to determination of 21 trace elements in fruit wine.After microwave digestion,the samples were determined directly by inductively coupled plasma mass spectrometry.Under the optimal conditions,the calibration curves for 21 metal elements were linear in the range of 0～10 μg/mL with correlation coefficients more than 0.999.The quantization limit of the method were ranged from 0.010 ng/g to 3.911 ng/g with RSD of 0.59%～4.16%(n=6).The mean recoveries of 21 metal elements from spiked samples at the spiking levels of 0.001～3000 μg/g were ranged from 89.7% to 112%.The proposed method is fast,simple,sensitive and accurate,which can meet the demand for determining 19 metal elements in fruit wine.