Rapid identification of volatile organic compounds and their isomers in the atmosphere

Abstract

Isomers are widely present in volatile organic compounds (VOCs), and it is a tremendous challenge to rapidly distinguish the isomers of VOCs in the atmosphere. In this paper, laser induced breakdown spectroscopy (LIBS) technology was developed to online distinguish VOCs and their isomers in the atmosphere. First, LIBS was used to directly detect halogenated hydrocarbons (typical class of VOCs) in the atmosphere and the characteristic peaks of the related halogens were observed in the LIBS spectra. Then, comparing the LIBS spectra of various samples, it was found that for the VOCs with different molecular formulas, although the spectra are completely the same in element composition, there are still significant differences in the relative intensity of the spectral lines and other information. Finally, in light of the shortcomings of traditional LIBS technology in identifying isomers, machine learning algorithms were introduced to develop the LIBS technology to identify the isomers of VOCs in the atmosphere, and the recognition results were very good. It is proved that LIBS technology combined with machine learning algorithms is promising for online traceability of VOCs in the atmosphere.

In-Situ Online Detection Of Atmospheric Volatile Organic Compounds Based On Laser Induced Breakdown Spectroscopy: A Review

“…Zhang et al studied rapid identification of VOCs and their isomers in the atmosphere. 105 LIBS technology was developed to online distinguish VOCs and their isomers in the air. In this work, dibromoethane and fluorobromobenzene were used as experimental subjects.…”

Rapid detection and recognition of phosphors using laser-induced breakdown spectroscopy and principal component analysis method—back propagation neural network algorithm

“…Spectroscopic method is an important method for the identification of phosphor materials. Laser induced breakdown spectroscopy (LIBS) [6,7] is a new material composition detection and analysis technology based on atomic leap emission spectroscopy, compared with traditional spectral analysis methods such as ICP-ES, ICP-MS, Spark-ES [8]. LIBS also has the incomparable advantages of multiple detection elements, simple sample preparation, fast response, and high detection accuracy [9].…”

Experimental study on toluene removal by a two-stage plasma-biofilter system

“…The control of VOC emissions could effectively improve the air quality in cities. Low-temperature plasma technology showed many advantages in the treatment of VOCs, such as easy access, simple equipment, easy operation, high efficiency and so on [3][4][5]. Such advantages made this method to be a research hotspot in the field of waste gas treatment in recent years [6,7].…”