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SnifProbe: new method and device for vapor and gas sampling
1School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Israel.
Journal of Chromatography. A
|January 12, 2001
Summary
SnifProbe enables field and process analysis by using short columns for sample collection, which are then directly introduced into GC-MS for high-quality results. This portable system extends laboratory capabilities to remote or on-site locations.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Chemical Engineering
Background:
- Traditional gas chromatography-mass spectrometry (GC-MS) analysis often requires samples to be transported to a laboratory, limiting real-time monitoring capabilities.
- Field and process analysis present challenges due to the need for portable, efficient, and sensitive sampling methods.
- Existing methods for air, headspace, and aroma sampling can be cumbersome or lack the direct interface required for immediate GC-MS analysis.
Purpose of the Study:
- To introduce SnifProbe, a novel system for simplified and direct sampling for GC-MS analysis.
- To demonstrate the versatility and effectiveness of SnifProbe across a wide range of applications, from air pollution to aroma analysis.
- To highlight SnifProbe's ability to bridge the gap between field sampling and laboratory-based GC-MS analysis.
Main Methods:
- Utilizes 15 mm short capillary or porous layer open tubular columns for sample collection.
- Employs a miniaturized frit-bottomed packed vial (MicroSPE) for sampling various vapors and gases.
- Features a direct sample introduction device (ChromatoProbe) for seamless transfer of the short column into the GC injector.
Main Results:
- SnifProbe effectively collected and analyzed diverse samples including benzene, toluene, o-xylene in air, SO2, perfume aroma, beer headspace, wine/coffee aroma, cigarette smoke, chemical warfare agent simulants, explosives vapors, ethanol in breath, and cooking gas odorants.
- Demonstrated applicability in both field and chemical process environments.
- Short sample columns can be stored and transported to the laboratory for analysis using conventional GC and GC-MS.
Conclusions:
- SnifProbe offers a significant advancement in field and process analysis by enabling direct sample introduction into GC-MS.
- The system extends the reach of analytical laboratories, facilitating high-quality on-site and in-process measurements.
- SnifProbe's ease of use and broad applicability make it a valuable tool for environmental monitoring, quality control, and security applications.