| Title: | "Physical and Chemical Properties of 3-Methyl-1,2,3-butanetricarboxylic Acid (MBTCA) Aerosol" |
| Author(s): | Kostenidou E; Karnezi E; Kolodziejczyk A; Szmigielski R; Pandis SN; |
| Address: | "Department of Chemical Engineering, University of Patras , Patras, 26504, Greece. Institute of Chemical Engineering Sciences, ICE-HT , Patras, 26504, Greece. Department of Chemical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States. Institute of Physical Chemistry, Polish Academy of Sciences , 01-224 Warsaw, Poland" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "The properties and the chemical fate of later generation products of the oxidation of biogenic organic compounds are mostly unknown. The properties of fresh MBTCA aerosol, a later generation product of the oxidation of monoterpenes in the atmosphere, were determined combining an aerosol mass spectrometer (AMS), a thermodenuder, and a scanning mobility particle sizer. Based on its AMS spectrum m/z 141.055 (C(7)H(9)O(3)(+)) could be used as an MBTCA signature. The MBTCA particle density was 1.43 +/- 0.04 g cm(-3), its saturation concentration was (1.8 +/- 1.3) x 10(-3) mug m(-3) at 298 K, and its vaporization enthalpy was 150 +/- 15 kJ mol(-1). After OH radical exposure ( approximately 1.2 days) and UV illumination the average aerosol O:C ratio decreased from 0.72 to 0.58-0.64 suggesting net fragmentation. Our findings suggest that the reactions of MBTCA with OH lead to CO(2) loss with or without an oxygen addition" |
| Keywords: | Aerosols *Atmosphere Monoterpenes *Organic Chemicals Volatilization; |
| Notes: | "MedlineKostenidou, Evangelia Karnezi, Eleni Kolodziejczyk, Agata Szmigielski, Rafal Pandis, Spyros N eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2017/12/30 Environ Sci Technol. 2018 Feb 6; 52(3):1150-1155. doi: 10.1021/acs.est.7b04348. Epub 2018 Jan 22" |
