摘要
本文研究并建立了便携式能量色散X射线荧光光谱法(P-EDXRF)直接快速测定皮革制品中铅、镉、铬、汞、砷含量的分析方法,考察了该方法的检测精密度和准确度。实验结果表明,各元素相对标准偏差(RSD,n=11)在2.88%~6.78%之间,铅、汞、砷的检测限均小于2 mg/kg,镉、铬的检测限小于5 mg/kg。并同实验室常规方法湿法消解-电感耦合等离子体发射光谱法(ICP-AES)的检测结果进行比较,用于验证P-EDXRF法测定结果的准确性。结果表明,P-EDXRF测定值与标准值之间的相对标准偏差小于5%,同实验室常规方法测定值不存在显著性差异。该方法基本上能够满足皮革制品铅、镉、铬、汞、砷元素同时快速分析的要求。
A direct and rapid determination method of Pb,Cd,Cr,Hg and As in leather products samples by portable energy dispersion X-ray fluorescence spectrometry(P-EDXRF)was established.The precision and accuracy of the method were investigated,and the results showed that the relative standard deviations(RSD,n=11)of testing elements were 2.88%-6.78%.The limit of detection for Pb,Hg,As is all less than 2 mg/kg,and the limits of detection for Cd,Cr is all less than 5 mg/kg.The concentrations of the selected heavy metals determined by P-EDXRF and the conventional laboratory analysis-inductively coupled plasma-atomic emission spectrometry(ICP-AES)were compared to verify its feasibility.The results showed that the relative standard deviation between the P-EDXRF measured values and the values of the standard materials were less than 5%,and there was no significant difference between the two methods.The method could meet the requirements for simultaneous and rapid determination heavy metal Pb,Cd,Cr,Hg and As in leather products.
作者
蒋小良
魏晓恒
谢思瑶
胡业明
许瀛丹
吴瑞茹
刘敏慧
JIANG Xiao-Liang;WEI Xiao-Heng;XIE Si-Yao;HU Ye-Ming;XU Ying-Dan;WU Rui-Ru;LIU Min-Hui(Jiangmen Customs,Jiangmen 529000;China Certification&Inspection and Group Guangdong Co.,Ltd Jiangmcn Branch,Jiangmen 529000)
出处
《中国口岸科学技术》
2021年第4期49-53,共5页
China Port Science and Technology
基金
江门市基础与理论科技计划项目(2020JC03047)。
关键词
便携式能量色散X射线荧光光谱仪
皮革制品
重金属
快速测定
portable energy dispersion x-ray fluorescence spectrometry(EDXRF)
leather products
heavy metal
rapid determination
