Work

Investigating the variation of thermal conductivity with temperature to improve a portable gas chromatography (GC) system's specificity

Year: 2025

Type: article

Abstract: In the context of field thermal conductivity detector (TCD)-based gas chromatography (GC), we investigate a method to improve the system's specificity. The ratio of signals of two TCDs biased at two different voltages is calculated, allowing us to be independent of the analyte concentration and to exploit the fact that the thermal conductivity of any gaseous species varies uniquely with temperature. However, theoretical predictions as well as experiments indicate that this method helps peak identification only if the local analyte concentrations are far (2 to 3 orders of magnitude) beyond the typical concentrations encountered by portable trace analyzers.

Source: Journal of sensors and sensor systems

DOI: 10.5194/jsss-14-161-2025

Authors: Murielle Jurdit, Jean-François Bêche, Emilie Lefrançois, Florence Ricoul, Alexandre Teulle, Jean-Baptiste Tissot

Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Laboratoire d'Électronique des Technologies de l'Information, Université Grenoble Alpes

Language: English

Topic: Analytical Chemistry and Chromatography

Subfield: Spectroscopy

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $679

OpenAlex ID: W4413256391