Abstract
X-ray fluorescence (XRF) spectrometry is a popular method for noninvasive elemental analysis of a wide variety of sample types. Unfortunately, applications of XRF are complicated by the occurrence of interelement effects, which make the measured intensities complex functions of multiple-element concentrations. In this work, an implicit modeling method, partial least-squares (PLS), was used to correct for interelement effects in x-ray fluorescence analysis. Instead of fitting XRF peak intensities and concentrations to classical explicit models, the XRF spectra of a set of standard samples were used to build PLS models, implicitly relating the XRF spectra to the concentrations. Methods for the pretreatment of spectra are compared for a set of nickel alloy samples containing Fe, Cr, Ni, Mn, Mo, Ti, and Si. The PLS calibration method using appropriately preprocessed spectra gives the best results, when compared to the results from the literature and from a conventional explicit calibration model (MLR method).
PDF Article
More Like This
Multiple kinds of pesticide residue detection using fluorescence spectroscopy combined with partial least-squares models
Rendong Ji, Shicai Ma, Hua Yao, Yue Han, Xiao Yang, Ruiqiang Chen, Yinshang Yu, Xiaoyan Wang, Dongyang Zhang, TieZhu Zhu, and Haiyi Bian
Appl. Opt. 59(6) 1524-1528 (2020)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription