Photoacoustic Spectroscopy Gas Detection Technology Research Progress
Shuidong Xiong, Xiangyu Yin, Qi Wang, Qi Wang, Ji Xia, Ziqiang Chen, Hongwei Lei, Xin Yan, Aisong Zhu, Fengmei Qiu, Bin-Hai Chen, Qiaoyun Wang, Qiaoyun Wang, Lei Zhang, Keke Zhang
Abstract
Photoacoustic spectroscopy (PAS) can be utilized as an ultrasensitive gas detection method. The basic principles of gas detection using PAS are discussed in this paper. First, the basic instrumentation for a PAS gas detection system is introduced focusing on the photoacoustic cell. The discussion includes non-resonant photoacoustic cells and the different types of resonant photoacoustic cells, including the longitudinal photoacoustic cell, the Helmholtz photoacoustic cell, the T-type photoacoustic cell, and the high-frequency resonant photoacoustic cell. The basic working principles of each of these, cells as well as the advantages and disadvantages of photoacoustic cells are discussed, and the development of newer types of photoacoustic cells in recent years is outlined in detail. This review provides detailed reference information and guidance for interested researchers who would like to design and build advanced photoacoustic cells for gas detection.