电感耦合等离子体发射光谱法测定食品中的硼酸含量

Determination of boric acid in food by inductively coupled plasma-optical emission spectrometry

目的利用电感耦合等离子体发射光谱法测定食品中的硼元素,计算食品中的硼酸含量。方法食品样品采用微波消解仪按设定程序消解,消解液采用电感耦合等离子体发射光谱法(ICP-OES)测定。对ICP-OES测定硼元素的仪器条件进行优化。结果在0.100～5.000g/mL浓度范围内呈良好的线性,标准曲线为Y=63.38X+38.14,相关系数r为0.9997。本方法检出限为3.54μg/g。结论该方法是一种快速、有效的测定食品中硼酸的分析方法,可应用于市售的多种食品中的硼酸含量的测定。

Objective To determine the content of boron and boric acid in food by inductively coupled plasma-optical emission spectrometry(ICP-OES).Methods The food samples were digested by the microwave assisted digester under a prescribed program,then the sample solution obtained was used for the ICP-OES determination of boron content.The instrument parameters of ICP-OES determination of boron were optimized.Results A good linear relationship was detected in the concentration range of 0.100～5.000 μg/mL(r=0.9997),the formula of standard curve was Y=63.38X+38.14.The detection limit of this method was 3.54 μg/g.Conclusion The described method is fast and efficient,and can be applied for boric acid determination in various foods in the market.