内标法在土壤重金属镍元素X荧光分析中的应用研究  

Application of Internal Standard to Analysis of the Metal Ni Element in Soils by X-Ray Fluorescence Spectroscopy

作　　者：章炜[1,2] 张玉钧[1] 陈东[1] 刘晶[1] 王春龙[1] 张荣[1] 赵南京[1] 刘文清[1] 

机构地区：[1]中国科学院环境光学与技术重点实验室,安徽省环境光学监测技术重点实验室,中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]中国人民解放军陆军军官学院,安徽合肥230031

出　　处：《光谱学与光谱分析》2012年第4期1123-1126,共4页Spectroscopy and Spectral Analysis

基　　金：国家(863计划)项目(2009AA063005);国家重大科技专项(2008ZX07527-007,2009ZX07420-008-005);国家自然科学基金项目(60908018);安徽省科技计划项目(08010301107);中国博士后科学基金项目(20100470861)资助

摘　　要：利用能量色散型XRF重金属实验平台,在实验室自然大气环境下获取土壤的X射线荧光,通过X射线荧光光谱法定量分析了国家标准土壤样品中元素Ni的含量。实验研究了土壤中Ni元素的X荧光特征分析谱线,采用加入内标法测定了Ni元素定标曲线,并依据实验结果分析了内标元素选取方法。实验结果表明,对土壤样品进行内标法分析时,可选取基体中适宜元素作为内标元素;使用Pb的Lα线,Cu和Fe的Kα线作内标线时相对标准偏差(RSD)分别为6.24%,5.24%和5.22%,说明选择合适基体主量元素的特征谱线作为内标线,可有效提高测量结果的准确性。We quantitatively analyzed the content of the element Ni in the national standard soil samples by the method of Xray fluorescence spectroscopy through using EDXRF metal experimental platform in ambient environment of the laboratory. Stud ying the characteristics of Xray fluorescence of element Ni in the experiment, the calibration curve of element Ni was measured by using the adding internal standard method and the method of how to select the internal standard element was analysed accord ing to the experimental results. The experimental results demonstrate that the matrix suitable element can be selected as the in ternal standard element to analyse the soil samples＇ using Pb L line, Cu, Fe and Ko lines as internal standard lines, the relative deviation of element from the standard value is 6.24%, 5.24% and 5.22 %, which indicates that selecting the appropriate char acteristic line of the matrix major element as the internal standard line can effectively improve measurement accuracy of the re sults.

关 键 词：重金属 XRF 内标法 定量分析 

分 类 号：O657.34[理学—分析化学]