Abstract

Airborne halogen compounds have been found to greatly increase the intensity of the N₂ and NO molecular spectra of air in an ac spark. Chlorinated materials cause the largest enhancement followed by brominated, iodinated, and fluorinated compounds. This phenomenon can effectively be used to measure the presence of many volatilized halogen compounds present in concentrations as low as 1 ppm.

Online detection of halogen atoms in atmospheric VOCs by the LIBS-SPAMS technique

Qihang Zhang, Yuzhu Liu, Yu Chen, Yuanzhe Zhangcheng, Zeming Zhuo, and Lei Li
Opt. Express 28(15) 22844-22855 (2020)

Similarities in the Infrared Spectra of Homologous Compounds

Richard G. Fowler and Raymond M. Smith
J. Opt. Soc. Am. 43(11) 1054-1057 (1953)

Fundamental Research in Molecular Spectra*

R. W. B. Pearse
J. Opt. Soc. Am. 41(3) 148-152 (1951)

Apparatus for the Observation of Optical Molecular Spectra

A. E. Douglas and G. Herzberg
Appl. Opt. 6(10) 1593-1595 (1967)

A Hollow Cathode Source Applicable to Spectrographic Analysis for the Halogens and Gases*

J. Rand McNally, George R. Harrison, and Eugene Rowe
J. Opt. Soc. Am. 37(2) 93-98 (1947)