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This paper reports on a portable selective sensor for trace levels of hazardous vapors, which combines a two stage purge and trap vapor pre-concentration system, a MEMS gas-chromatographic (GC) separation column and a miniaturized quartz-enhanced photoacoustic spectroscopy (QEPAS) detector. This is the first demonstration of a miniaturized QEPAS device used as spectroscopic detector downstream of a FAST-GC separation column, demonstrating two-dimensional selectivity and enabling real-world analyses in dirty environments with response time of a few minutes. Furthermore, the integrated sensing system was specifically designed to be rugged and suitable to be deployed on unmanned robotic ground vehicles.
Publication date: 
23 Jun 2019

Sandro Mengali, Ivan Elmi, Luca Masini, Filippo Bonafé, Fabrizio Tamarri, Michele Sanmartin, Roberto Viola, Nicola Liberatore, Stefano Zampolli

Biblio References: 
Pages: 1365-1368
2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII)