微波消解-电感耦合等离子体质谱法测定湿基草莓中15种微量稀土元素

应用微波消解进行样品前处理,电感耦合等离子体质谱法测定湿基草莓中的15种微量稀土元素。试验结果表明,该方法相关系数(r)在0.999 5~1.000 0之间,方法回收率在94.2%~106.4%之间,方法精密度(RSD%)低于6.92%。该方法具有前处理过程简单、引入干扰少、准确度、精密度、检出限满足要求,同时具有线性范围广、测试速度快等特点,适合湿基草莓样品中微量稀土元素的测定。

Determination of 15 Trace Rare Earth Elements in the Fresh Strawberries by Inductively Coupled Plasma-Mass Spectrometry With Microwave Digestion

The microwave digestion method was used to decompose the sample, and then 15 trace rare earth elements in the fresh strawberries were determined by inductively coupled plasma-mass spectrometry. The results show that correlation coefficient (r) of the method is between 0.999 5 ~ 1.000 0, recoveries of the method are between 94.2%~106.4%, the precision (RSD%) is less than 6.92%. The method has simple process, high accuracy and precision, the detection limit can meet the requirements, so it is suitable for the determination of trace determination of rare earth elements in the fresh strawberries.