| Title: | Soft ionization chemical analysis of secondary organic aerosol from green leaf volatiles emitted by turf grass |
| Author(s): | Jain S; Zahardis J; Petrucci GA; |
| Address: | "University of Vermont , Department of Chemistry, 82 University Place, Burlington, Vermont 05405-0125, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Globally, biogenic volatile organic compound (BVOC) emissions contribute 90% of the overall VOC emissions. Green leaf volatiles (GLVs) are an important component of plant-derived BVOCs, including cis-3-hexenylacetate (CHA) and cis-3-hexen-1-ol (HXL), which are emitted by cut grass. In this study we describe secondary organic aerosol (SOA) formation from the ozonolysis of dominant GLVs, their mixtures and grass clippings. Near-infrared laser desorption/ionization aerosol mass spectrometry (NIR-LDI-AMS) was used for chemical analysis of the aerosol. The chemical profile of SOA generated from grass clippings was correlated with that from chemical standards of CHA and HXL. We found that SOA derived from HXL most closely approximated SOA from turf grass, in spite of the approximately 5x lower emission rate of HXL as compared to CHA. Ozonolysis of HXL results in formation of low volatility, higher molecular weight compounds, such as oligomers, and formation of ester-type linkages. This is in contrast to CHA, where the hydroperoxide channel is the dominant oxidation pathway, as oligomer formation is inhibited by the acetate functionality" |
| Keywords: | "Aerosols Mass Spectrometry Molecular Weight Poaceae/*chemistry Reference Standards Spectroscopy, Near-Infrared Volatile Organic Compounds/*analysis;" |
| Notes: | "MedlineJain, Shashank Zahardis, James Petrucci, Giuseppe A eng Research Support, U.S. Gov't, Non-P.H.S. 2014/03/29 Environ Sci Technol. 2014 May 6; 48(9):4835-43. doi: 10.1021/es405355d. Epub 2014 Apr 9" |
