Abstract：Total concentrations of As, Zn, Pb and Cr were determined in soil samples by using X-ray fluorescence spectrometry. The instrument applicability was good by analyzing the detection limit and accuracy of the instrument. Then, the energy rangesand variable numbersof heavy metal elements were obtained by using two-dimensional correlation spectroscopy. The variable numbersof Pb (10.380~10.740 and 12.435~12.900 keV), As (10.380~10.740 and 11.610~11.880 keV), Cr (5.310~5.520 and 5.805~6.015 keV) and Zn (8.520~8.805 and 9.555~9.630 keV) were 57, 44, 30 and 26, respectively. Finally, X-ray fluorescence spectrometry analysis models for heavy metal elements were established based on selected energy ranges by using partial least-squares regression. The results showed that the model performance was best for As, followed by Pb, Zn and Cr, and Rp were higher than 0.92. The study indicated that the prediction performance of model is improved using optimal energy ranges and the PXRF analyzer is suitable for in-situ monitoring of heavy metals in soil.
Key words：X-ray fluorescence spectrometry; Soil heavy metals; Two-dimensional correlation spectroscopy; Partial least squares regression
基金资助: The National Key Research and Development Program of China (2017YFD0801201)
通讯作者:
韩 平
E-mail: hanping1016@163.com
作者简介: WANG Shi-fang，(1989—), master, Beijing Research Center for Agriculture Standards and Testing
引用本文:
王世芳，罗 娜，韩 平. 能量色散X射线荧光光谱检测土壤重金属砷、锌、铅和铬[J]. 光谱学与光谱分析, 2018, 38(05): 1648-1654.
WANG Shi-fang, LUO Na, HAN Ping. Application of Energy-Dispersive X-Ray Fluorescence Spectrometry to the Determination of As, Zn,Pb and Cr in Soil. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(05): 1648-1654.
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