High sensitivity and ultra-low concentration range photoacoustic spectroscopy based on trapezoid compound ellipsoid resonant photoacoustic cell and partial least square

Qiaoyun Wang; Shunyuan Xu; Ziheng Zhu; Jilong Wang; Xin Zou; Chu Zhang; Qiang Liu

Photoacoustics (Feb 2024)

High sensitivity and ultra-low concentration range photoacoustic spectroscopy based on trapezoid compound ellipsoid resonant photoacoustic cell and partial least square

Qiaoyun Wang,
Shunyuan Xu,
Ziheng Zhu,
Jilong Wang,
Xin Zou,
Chu Zhang,
Qiang Liu

Affiliations

Qiaoyun Wang: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China; Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, China; Corresponding author at: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China.
Shunyuan Xu: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
Ziheng Zhu: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
Jilong Wang: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
Xin Zou: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
Chu Zhang: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
Qiang Liu: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China; Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, China

Journal volume & issue: Vol. 35
p. 100583

Abstract

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A high sensitivity and ultra-low concentration range photoacoustic spectroscopy (PAS) gas detection system, which was based on a novel trapezoid compound ellipsoid resonant photoacoustic cell (TCER-PAC) and partial least square (PLS), was proposed to detect acetylene (C2H2) gas. In the concentration range of 0.5 ppm ∼ 10.0 ppm, the limit of detection (LOD) values of TCER-PAC-based PAS system without data processing was 66.4 ppb, which was lower than that of the traditional trapezoid compound cylindrical resonant photoacoustic cell (TCCR-PAC). The experimental results indicated that the TCER-PAC had higher sensitivity than of TCCR-PAC. Within the concentration range of 12.5 ppb ∼ 125.0 ppb, the LOD and limit of quantification (LOQ) of TCER-PAC-based PAS system combined with PLS regression algorithm were 1.1 ppb and 3.7 ppb, respectively. The results showed that higher detection sensitivity and lower LOD were obtained by PAS system with TCER-PAC and PLS than that of TCCR-PAC-based PAS system.

Published in Photoacoustics

ISSN: 2213-5979 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics: Acoustics. Sound; Science: Physics: Optics. Light
Website: http://www.journals.elsevier.com/photoacoustics/

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