| Title: | Online Volatile Compound Emissions Analysis Using a Microchamber/Thermal Extractor Coupled to Proton Transfer Reaction-Mass Spectrometry |
| Author(s): | Pham YL; Wojnowski W; Beauchamp J; |
| Address: | "Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Strasse 35, 85354 Freising, Germany. Department of Chemistry and Pharmacy, Chair of Aroma and Smell Research, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Henkestrasse 9, 91054 Erlangen, Germany. Department of Analytical Chemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 Narutowicza Street, 80-233 Gdansk, Poland. Department of Chemistry, University of Oslo, P.O. Box 1033-Blindern, 0315 Oslo, Norway" |
| DOI: | 10.1021/acs.analchem.2c03454 |
| ISSN/ISBN: | 1520-6882 (Electronic) 0003-2700 (Print) 0003-2700 (Linking) |
| Abstract: | "Indoor air is a complex and dynamic mixture comprising manifold volatile organic compounds (VOCs) that may cause physiological and/or psychological discomfort, depending on the nature of exposure. This technical note presents a novel approach to analyze VOC emissions by coupling a microchamber/thermal extractor (mu-CTE) system to a proton transfer reaction-mass spectrometer (PTR-MS). This configuration provides an alternative to conventional emissions testing of small objects. The dynamic emission profiles of VOCs from a representative 3D-printed model are presented as a proof-of-concept analysis. Emission profiles are related to the target compound volatility, whereby 2-propanol and acetaldehyde exhibited the highest emissions and most rapid changes compared to the less volatile vinyl crotonate, 2-hydroxymethyl methacrylate, and mesitaldehyde, which were present at lower concentrations and showed different dynamics. Comparative measurements of the emission profiles of these compounds either with or without prior static equilibration yielded stark differences in their dynamics, albeit converging to similar values after 15 min of sampling time. Further, the utility of this system to determine the time required to capture a specific proportion of volatile emissions over the sampling period was demonstrated, with a mean duration of 8.4 +/- 0.3 min to sample 50% of emissions across all compounds. This novel configuration provides a means to characterize the dynamic nature of VOC emissions from small objects and is especially suited to measuring highly volatile compounds, which can present a challenge for conventional sampling and analysis approaches. Further, it represents an opportunity for rapid, targeted emissions analyses of products to screen for potentially harmful volatiles" |
| Keywords: | *Volatile Organic Compounds/analysis Protons Mass Spectrometry/methods *Air Pollutants/analysis; |
| Notes: | "MedlinePham, Y Lan Wojnowski, Wojciech Beauchamp, Jonathan eng Research Support, Non-U.S. Gov't 2022/12/09 Anal Chem. 2022 Dec 20; 94(50):17354-17359. doi: 10.1021/acs.analchem.2c03454. Epub 2022 Dec 8" |
