The PolySense and Polysense Innovations teams have just published a new article on Sensors and Actuators B Chemical Journal (IF 7.7) reporting on a hybrid sensing platform that integrates GC with Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) combining the temporal separation capabilities of GC with the high sensitivity and molecular selectivity of mid-infrared laser spectroscopy. This dual-domain approach enables: (i) selective identification and quantification of light alkanes in complex natural gas mixtures; (ii) sub-ppm detection of propane using a single interband cascade laser emitting at 3.367 µm; and (iii) isotopic discrimination between methane isotopologues (12CH₄ and 13CH₄) employing a quantum cascade laser operating near 7.81 µm. By overcoming spectral overlap through chromatographic separation and leveraging QEPAS’s intrinsic sensitivity, the GC–QEPAS configuration offers a high-performance alternative to GC–FID/MS for in situ compositional and isotopic gas analysis.
The following link provides access to the article:
http://polysense.poliba.it/wp-content/uploads/2026/06/1-s2.0-S0925400526008579-main.pdf
