XRF和PXRF测定土壤中10种重金属元素方法研究  

Determination of 10 Heavy Metal Elements in Soil by XRF and PXRF

作　　者：刘崇山 杨萍萍 陈云镇 蔡洁滢 Liu Chong-shan;Yang Ping-ping;Chen Yun-zhen;Cai Jie-ying(Quanzhou Environmental Monitoring Center Station of Fujian,Quanzhou,Fujian 362000,China)

机构地区：[1]福建省泉州环境监测中心站,福建泉州362000

出　　处：《福建分析测试》2024年第5期13-17,共5页Fujian Analysis & Testing

摘　　要：本文采用台式X射线荧光光谱仪(台式XRF)和便携式X射线荧光分析仪(PXRF)分别对土壤中Cu、Cr、Pb、Zn、Ni、As、Co、V、Mn和Ti等10种元素进行监测分析。采用台式XRF分析这10种元素在各自相应的范围内线性良好,r=0.9990~0.9999,检出限为0.8 mg/kg~5.5 mg/kg,平行测定3次的RSD<2%;而采用PXRF测定,RSD<10%,准确度明显低于台式XRF,对土壤中Cr、Zn、Ni、As、Co、V和Mn等部分元素仅可进行半定量分析。X射线荧光光谱法简化了土壤样品分析,解决了传统的检测分析方法,耗时长,前处理复杂,强酸的使用易导致环境的二次污染等问题,在土壤重金属分析中具有明显的优势。Heavy metals Cu,Cr,Pb,Zn,Ni,As,Co,V,Mn and Ti in soil was detectedusing X-ray fluorescence spectrometer(XRF)and portable X-ray fluorescence analyzer(PXRF)in this work,respectively.The results obtained using XRF tech⁃nique showed that the good linear ranges with r=0.9990-0.9999.The detection limits for the 10 heavy metal elements were 0.8 mg/kg-5.5 mg/kg,and the relative standard deviation was less than 2%obtained by XRF and less than 10%by PXRF.The tests showed that the PXRF analyzer could be used for determining Cu,Pb and Ti in the soil qualitatively and quantitatively,and for a semi-quantitative and qualitative analysis on Cr,Zn,Ni,As,Co,V and Mn.The XRF-technology,simplifying the analysis of soil samples,solving the problems found in traditional detection method such as such as,long time consuming,complex pretreatment process,and secondary pollution to environment caused by the strong acid use,could be used for rapid assessment of the metal contamination in soil,with significant advantages.

关 键 词：台式X射线荧光光谱仪 便携式X射线荧光分析仪 土壤 重金属 

分 类 号：O657.34[理学—分析化学]