悬浮液进样-全反射X射线荧光光谱法测定进口鱼粉中的铬、砷、汞、铅含量  

Determination of chromium, arsenic, mercury and lead in imported fish meals by total reflection X-Ray fluorescence spectrometry using suspension samplin

作　　者：周衡刚 朱克卫 徐正华 刘正华 郑思珩 王伟 余裕娟 ZHOU Heng-gang;ZHU Ke-wei;XU Zheng-hua;LIU Zheng-hua;ZHENG Si-heng;WANG Wei;YU Yu-juan

机构地区：[1]黄埔海关技术中心,广东广州510730 [2]国家酒类检测重点实验室(广东),广东广州510730 [3]中山市小榄镇农业服务中心,广东中山528415

出　　处：《饲料研究》2020年第10期98-100,共3页Feed Research

基　　金：原广东出入境检验检疫局科技项目(项目编号:2018GDK52)。

摘　　要：文章建立了一种悬浮液进样-全反射X射线荧光光谱法(TXRF)同时测定进口鱼粉中的铬(Cr)、砷(As)、汞(Hg)和铅(Pb)含量的方法。方法采用1%Triton X-100水溶液为分散试剂,Ga元素为内标。铬、砷、汞和铅的检出限分别为0.61、0.15、0.20、0.20 mg/kg,相对标准偏差均小于5%,加标回收率为84.1%~103.0%。通过TXRF法与ICPMS法分别对鱼粉样品进行测定,两种方法所得结果在95%置信区间无显著性差异。该方法简便、快速、经济,可应用于进口鱼粉中铬、砷、汞和铅含量的检测。A method for the determination content of chromium,arsenic,mercury and lead in imported fish meals by total reflection X-ray fluorescence spectrometry(TXRF)with suspension sampling was developed.1%Triton X-100 aqueous solution was used as dispersion reagent.The quantity of the four heavy metals was determined by internal standard method with Ga element as a reference.The detection limit of Cr,As,Hg and Pb in the solution was 0.61,0.15,0.20 and 0.20 mg/kg,the precision(RSD)was less than 5%,and the recovery rate was 84.1%~103.0%.It was also found that the measurement results analyzed by the methods of TXRF and ICP-MS for the samples had no significant difference in the 95%confidence interval.The developed method is simple,fast and cost-effective.TXRF can be applied to the detection of chromium,arsenic,mercury and lead in imported fish meal.

关 键 词：鱼粉 饲料 重金属 全反射X射线荧光光谱 

分 类 号：S816.17[农业科学—饲料科学]