微波消解-电感耦合等离子体发射光谱法分析食品中的总硼

采用微波消解-电感耦合等离子体原子发射光谱法(ICP-OES)测定了不同食品中总硼的含量。对微波消解样品前处理条件和仪器参数进行了选择和优化。方法对硼元素的检出限为0.10 mg/kg。方法的精密度(RSD,n=6)为1.6%~6.8%;回收率为96.5%~104.0%。方法用于分析国家一级标准参考物质GBW 07605(茶叶)、GBW 08501(桃叶)、面粉与鱿鱼粉中的硼,测定值与标准值或参考值吻合。

Determination of Total Boron in Foods by Inductively Coupled Plasma-Optical Emission Spectrometry with Microwave Digestion Sample Preparation

A method for the determination of boron in foods by microwave sample digestion-inductively coupled plasma optical emission spectrometry was proposed.The conditions for sample digestion and instrumental parameters were optimized by the experiments.The detection limit of the method for boron is 0.10 mg/kg and the recovery is 96.5%~104.0% with precision of 1.6%~6.8%RSD(n=6).The method has been applied to the determination of boron in National Standard Reference Materials GBW 07605(tea),GBW 08501(peach leaf) and flour,sleeve fish powder samples.The results are in good agreement with the certified or reference values.