Add to BibSonomy
Abstract
Laser-induced breakdown spectroscopy (LIBS) 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.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Jhon Pareja, Sebastian López, Daniel Jaramillo, David W. Hahn, and Alejandro Molina
Appl. Opt. 52(11) 2470-2477 (2013)
Cuiping Lu, Min Wang, Liusan Wang, Haiying Hu, and Rujing Wang
Appl. Opt. 58(27) 7510-7516 (2019)
Nan Li, Jinjia Guo, Chao Zhang, Yongquan Zhang, Qingyang Li, Ye Tian, and Ronger Zheng
Appl. Opt. 58(14) 3886-3891 (2019)