Improving the spectral qualities of major elements in soil by controlling the ambient pressure in time-resolved laser-induced breakdown spectroscopy

被引：5

作者：

Yi, Rongxing ^{[1
]}

Yang, Xinyan ^{[2
]}

Lin, Fangrui ^{[1
]}

Ren, Sheng ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst Guangdong Prov, Shenzhen 518060, Guangdong, Peoples R China

[2] Anhui Normal Univ, Dept Phys, Anhui Prov Key Lab Optoelect Mat Sci & Technol, Wuhu 241000, Anhui, Peoples R China

来源：

APPLIED OPTICS | 2019年 / 58卷 / 32期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

ACCURACY IMPROVEMENT; LIBS; SPECTROMETRY;

D O I：

10.1364/AO.58.008824

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Laser-induced breakdown spectroscopy (LIES) is a powerful tool in the soil monitoring field, but the poor spectral quality limits its application. To improve the spectral quality of major elements in soil samples, a method based on controlling the ambient pressure and time sequence was introduced. Spectral qualities that include signal-to-background ratio (SBR), spectral stability, and spectral profile were all studied in different ambient pressures and delay times. The results show that the SBRs of Na and K elements increased from 20 to about 300, when the air pressure and delay time were controlled. Meanwhile, the relative standard deviations were improved from more than 30% to less than 5% due to the release of the self-absorption effect. This work proved that the spectral qualities of LIBS can be improved a lot by controlling the ambient pressure in the field of detecting major elements in soil. (C) 2019 Optical Society of America

引用

页码：8824 / 8828

页数：5

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