Accuracy improvement of quantitative analysis in laser-induced breakdown spectroscopy using modified wavelet transform

被引：58
作者：
Zou, X. H. [1 ]
Guo, L. B. [1 ]
Shen, M. [1 ]
Li, X. Y. [1 ]
Hao, Z. Q. [1 ]
Zeng, Q. D. [1 ]
Lu, Y. F. [1 ]
Wang, Z. M. [1 ]
Zeng, X. Y. [1 ]
机构：
[1] Huazhong Univ Sci & Technol, WNLO, Wuhan 430074, Hubei, Peoples R China
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 09期
基金：
中国国家自然科学基金;
关键词：
CONFINEMENT; EMISSION; CARBON;
D O I：
10.1364/OE.22.010233
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A modified algorithm of background removal based on wavelet transform was developed for spectrum correction in laser-induced breakdown spectroscopy (LIBS). The optimal type of wavelet function, decomposition level and scaling factor gamma were determined by the root-mean-square error of calibration (RMSEC) of the univariate regression model of the analysis element, which is considered as the optimization criteria. After background removal by this modified algorithm with RMSEC, the root-mean-square error of cross-validation (RMSECV) and the average relative error (ARE) criteria, the accuracy of quantitative analysis on chromium (Cr), vanadium (V), cuprum (Cu), and manganese (Mn) in the low alloy steel was all improved significantly. The results demonstrated that the algorithm developed is an effective pretreatment method in LIBS to significantly improve the accuracy in the quantitative analysis. (C)2014 Optical Society of America
引用
收藏
页码：10233 / 10238
页数：6
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