摘要
为解决电感耦合等离子体质谱仪(ICP-MS)测定蜂王浆中硒(Se)含量时产生的干扰问题,应用动态反应池(DRC)技术,通过对反应气种类、流量及测定元素同位素的优化,确定了消除干扰的方法。实验结果表明,当以78Se为分析物,甲烷(CH_4)为反应气且流量为0.5 m L·min^(-1)时,可有效降低干扰。该方法的线性范围宽(0.1~100μg·L^(-1)),检出限低(0.052 2μg·L^(-1)),精密度好,重复测定7次结果的相对标准偏差(RSD)均小于5%,加标回收率为95.0%~103.9%。实际样品测定结果显示,DRC-ICP-MS法与经典原子荧光法的测定结果相比无显著差异。
To eliminate the interference on the determination of selenium（Se） in royal jelly by inductively coupled plasma mass spectrometry（ICP-MS），a dynamic reaction cell（DRC） method was established by the study of reaction gas species，flow rate and isotope of Se.The results showed that 78Se was suitable for the analysis.The interference on the determination of Se was eliminated when CH4 was used as reaction gas and its flow rate was set to 0.5 mL？min-1.The method had a wide linear range of 0.1-100 μg？L-1 and a low detection limit of 0.052 2 μg？L-1.The relative standard deviations（RSD） were less than 5%.The recoveries were between 95.0% and 103.9%.The differences of the results of Se in royal jelly samples determined by DRC-ICP-MS and atomic fluorescence spectrometry were not significant.
出处
《分析测试学报》
CAS
CSCD
北大核心
2016年第9期1191-1194,共4页
Journal of Instrumental Analysis
基金
公益性行业(农业)科研专项(201303106)
国家自然科学基金(41301341)
