Journal of Sensors and Sensor Systems
Journal of Sensors and Sensor Systems
JSSS
Articles | Volume 14, issue 2
Articles | Volume 14, issue 2
https://doi.org/10.5194/jsss-14-161-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jsss-14-161-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 14, issue 2
Regular research article
 | 
08 Aug 2025
Regular research article |  | 08 Aug 2025

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

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

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Short summary
In a miniaturized gas chromatography system, there could be identification doubt between compounds eluting at close retention times. When a sensor is a thermal conductivity detector (TCD), we investigated a double-measurement approach (two temperatures) to improve specificity. Unfortunately, both theory and experiments showed that this method could only work for relatively high compound concentrations (1–50 ppm). This is therefore not relevant for a trace analysis system (1–10 ppb).
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