能量色散X射线荧光光谱法快速测定烟草中的镉和铅  

Rapid determination of cadmium and lead in tobacco with energy dispersive X ray fluorescence spectrometry

作　　者：倪子月 陈吉文[1,2] 刘明博 廖学亮 韩冰 孟祥娥 王志杰 李瑞 杨博赞 

机构地区：[1]钢铁研究总院,学院南路76号100081 [2]钢研纳克检测技术有限公司,丰贤中路11号100094

出　　处：《中国烟草学报》2016年第4期8-13,共6页Acta Tabacaria Sinica

基　　金：科技部国家重大科学仪器设备开发专项(No.2012YQ05007602)

摘　　要：建立了能量色散X射线荧光光谱法(EDXRF)快速测定烟草中的镉和铅的方法。研究表明:在优化的试验条件下,方法的线性关系良好,镉和铅的线性范围分别为0.18~4.73 mg·kg^(-1)和0.20~3.85 mg·kg^(-1),检出限分别为0.054 mg·kg^(-1)和0.06 mg·kg^(-1),测定结果与烟草行业标准ICP-MS法定值的相对偏差均小于5%,RSD均小于7.4%,表明该方法适用于对烟草中的镉、铅进行快速检测。A method for rapid determination of cadmium and lead in tobacco with energy dispersive X ray fluorescence spectrometry was developed. The influences of different forms and mass of sample were studied, while parameters of instrument were optimized. For the detection of cadmium, the linear correlation coefficient was 0.9937, the limit of detection was 0.054 mg·kg^（-1）, the linear range was from 0.18 to 4.73 mg·kg^（-1）. And for the detection of lead, the linear correlation coefficient was 0.9908, the limit of detection was 0.06 mg·kg^（-1）, and the linear range was from 0.20 to 3.85 mg·kg^（-1）. The results proved that,in comparison with inductively coupled plasma mass spectrometry（ICP-MS）, energy dispersive X ray fluorescence spectrometry can be used to rapidly detect cadmium and lead in tobacco.

关 键 词：烟草 镉 铅 能量色散X射线荧光光谱 

分 类 号：O657.34[理学—分析化学] TS411[理学—化学]