Remote optical measurement techniques: underperformance or overexpectation?

Selectivity of Terahertz Gas-Phase Spectroscopy

“…Accurate analysis of gaseous samples is critical for a variety of applications, including headspace analysis for process control, environmental monitoring for atmospheric sciences, − and evolved gas analysis of chemical processes. − Analytical spectroscopy is one approach for such measurements where broadband electromagnetic radiation is transmitted through a representative sample of the gaseous environment and the concentrations of target analytes are determined from an analysis of the resulting spectrum. Spectroscopic approaches of this nature rely on selective information embedded within the collected spectra, are not complicated by the need for chemical reagents or physical separations to enhance measurement accuracy, and can rapidly and nondestructively provide analytical information for multiple components of a sample.…”