便携式EDXRF分析仪测定土壤中镍元素的含量预测模型研究

doi:10.3964/j.issn.1000-0593(2013)08-2242-04

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摘要：论述了便携式能量色散X射线荧光分析仪在土壤重金属元素镍测定过程中，基体效应对测量结果的影响，提出以样品散射的X管的标识靶线(钨靶L_α1线)作为比较标准的特散比校正模型，并在此基础上结合吸收元素校正法对基体效应进行校正，以此建立的含量预测模型，相关系数为0.999，剩余标准差为2.541。利用该模型对土壤标样中镍含量进行测量，与标准值比较，其平均相对误差为3.90%，且精确度较高。

关键词：能量色散X射线荧光分析;基体效应;含量预测;土壤;镍

Abstract：The present paper discusses the influence of matrix effect on measurement results when portable energy dispersive X-ray fluorescence analyzer is used for the determination of Ni in soil. Based on the scattered X-ray intensity of WL_αemitted from the X-ray tube on the sample, a correction method was proposed, and it combines with the correction of absorption element, which can effectively overcome the matrix effect. The correlation coefficient of the content prediction model based on this method is 0.999 and the residual standard deviation is 2.541. The average relative error is 3.90% when the content prediction model is used to measure the content of Ni in the national standard soil samples, so the results coincide well with standard values, and the precision is high.

Key words：Energy dispersive X-ray fluorescence analysis;Matrix effect;Content prediction;Soil;Nickel

收稿日期: 2013-05-02 修订日期: 2013-06-24

中图分类号:

O657.3

通讯作者: 李丹 E-mail: lidan08@cdut.cn

引用本文:

王广西，李丹^*，赖万昌，翟娟，杨中建，侯鑫，曹发明 . 便携式EDXRF分析仪测定土壤中镍元素的含量预测模型研究 [J]. 光谱学与光谱分析, 2013, 33(08): 2242-2245.
WANG Guang-xi, LI Dan^*, LAI Wan-chang, ZHAI Juan, YANG Zhong-jian, HOU Xin, CAO Fa-ming . Research on the Content Prediction Model for the Determination of Nickel in Soil by Portable Energy Dispersive X-Ray Fluorescence Analyzer . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(08): 2242-2245.

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