Integrated interferometers as a new platform for low cost gas chromatography detection - Institut de Chimie du CNRS
Journal Articles Talanta Year : 2025

Integrated interferometers as a new platform for low cost gas chromatography detection

Abstract

Gas chromatography is a reference method for gas analysis. As part of efforts to miniaturize gas chromatography systems, the miniaturization of detectors is essential. In this work, we report a new integrated photonic platform for gas chromatography analyte detection. The fabricated silicon die integrates Mach-Zehnder interferometers into low dead volume microfluidic channels, with coherent cost-effective detection scheme with a fixed 850 nm wavelength laser. A proof of concept is demonstrated with the separation and detection of three volatile organic compounds: heptane, octane, and toluene. Peaks' widths at half height range from 1 to 5 seconds. Peaks are very well resolved by our system, which acquires more than 100 points per second. From a heptane dilution range, we evaluate the limit of detection of our system to be the headspace of a 0.22% heptane concentration solution. To our knowledge, these are the first integrated Mach-Zehnder interferometers reported for gas chromatography detection. This work could open new strategies for fast low cost and low limit of detection specific gas chromatography silicon micro-detectors.
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Dates and versions

hal-04692575 , version 1 (10-09-2024)

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Pomme Hirschauer, Benoît Paris, Sonia Messaoudene, Maryse Fournier, Bertrand Bourlon, et al.. Integrated interferometers as a new platform for low cost gas chromatography detection. Talanta, 2025, 281, pp.126659. ⟨10.1016/j.talanta.2024.126659⟩. ⟨hal-04692575⟩
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