Baseline correction algorithm for laser-induced breakdown spectroscopy

PAN Gaowei; SHI Jinfang; QIU Rong; WANG Huili; WAN Qing; ZHANG Zhiwei; WANG Kai

doi:10.5768/JAO202243.0307002

Journal of Applied Optics > 2022 > 43(3): 538-543. > DOI: 10.5768/JAO202243.0307002

PAN Gaowei, SHI Jinfang, QIU Rong, WANG Huili, WAN Qing, ZHANG Zhiwei, WANG Kai. Baseline correction algorithm for laser-induced breakdown spectroscopy[J]. Journal of Applied Optics, 2022, 43(3): 538-543. DOI: 10.5768/JAO202243.0307002

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Baseline correction algorithm for laser-induced breakdown spectroscopy

PAN Gaowei^{1, 2,},
SHI Jinfang^{1, 2, ,},
QIU Rong¹,
WANG Huili¹,
WAN Qing³,
ZHANG Zhiwei¹,
WANG Kai¹

1.
Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
2.
School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
3.
Teaching and Research Assurance Center, Army Logistics University of PLA, Chongqing 401331, China

More Information

Received Date: November 09, 2021
Revised Date: February 06, 2022
Available Online: April 17, 2022

Graphical Abstract

Abstract

Abstract

Aiming at the problem of periodic arch protrusion in laser-induced breakdown spectroscopy (LIBS) data, an improved baseline correction algorithm was proposed. By adjusting the local penalty coefficients, the algorithm which was based on penalized least square method could not only fit the periodic arch protrusion, but also reduce the effect of spectral lines intensity on fitting baseline. Compared with other baseline correction methods, the root-mean-square error (RMSE) of the proposed algorithm was smaller when fitting the simulation baseline, and the correlation coefficients of the calibration curve based on spectral data obtained by the proposed algorithm reached 0.997 2. The results show that compared with the existing baseline removal method, the proposed algorithm can better retain the effective information of the spectral data when the echelle grating spectrometer collecting the baseline of LIBS.
- echelle grating spectrometer,
- baseline correction,
- penalized least square method,
- laser-induced breakdown spectroscopy

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References (16)

References

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Baseline correction algorithm for laser-induced breakdown spectroscopy