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Mendes M, Bou-Debes D, Eden S, Bundaleski N, Teodoro OMND, Cornetta LM, Ferreira da Silva F. Electron ionization induced fragmentation pathways of trichloroanisole. Phys Chem Chem Phys 2023; 25:25361-25367. [PMID: 37703052 DOI: 10.1039/d3cp02019c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Trichloroanisole (TCA) is one of the most significant contaminants in cork stoppers. The presence of TCA leads to an unpleasant odor known as "cork taint", resulting in high economic losses for the cork and wine industries. Hence, the detection, quantification, and characterization of TCA are essential to address this concern. The present study investigates the electron-driven fragmentation pathways of TCA through electron ionization mass spectrometry as a function of electron energy (0-100 eV), and the results are supported by theoretical characterization of ionization potentials, dissociation thresholds, and electron ionization cross sections. The appearance energies of ten cations were measured, including the first experimental evaluation of the molecule's ionization energy at 8.8 ± 0.3 eV, in excellent agreement with the calculations (8.83 eV). For lower energies, around 20 eV, the parent cation accounted for more than 60% of the total ion signal, followed by its demethylated fragment. Taken together, these ion signals could be used as fingerprints of TCA in industrial quality control by low-energy electron ionization mass spectrometry. Fifty other fragments have been identified at higher electron energies, revealing the very rich fragmentation pattern of TCA.
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Affiliation(s)
- Mónica Mendes
- CEFITEC, Department of Physics, Nova School of Sciences and Technology, Caparica P-2829-516, Portugal.
| | - Daniel Bou-Debes
- School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
| | - Samuel Eden
- School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
| | - Nenad Bundaleski
- CEFITEC, Department of Physics, Nova School of Sciences and Technology, Caparica P-2829-516, Portugal.
| | - Orlando M N D Teodoro
- CEFITEC, Department of Physics, Nova School of Sciences and Technology, Caparica P-2829-516, Portugal.
| | - Lucas M Cornetta
- Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil.
| | - Filipe Ferreira da Silva
- CEFITEC, Department of Physics, Nova School of Sciences and Technology, Caparica P-2829-516, Portugal.
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Asfandiarov NL, Muftakhov MV, Pshenichnyuk SA, Papp P, Danko M, Lacko M, Blaško J, Matejčik Š, Modelli A. Dissociative electron attachment to 2,4,6-trichloroanisole and 2,4,6-tribromoanisole molecules. J Chem Phys 2017; 147:234302. [DOI: 10.1063/1.5007816] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- N. L. Asfandiarov
- Institute of Molecule and Crystal Physics URC RAS, October Avenue 151, 450075 Ufa, Russia
| | - M. V. Muftakhov
- Institute of Molecule and Crystal Physics URC RAS, October Avenue 151, 450075 Ufa, Russia
| | - S. A. Pshenichnyuk
- Institute of Molecule and Crystal Physics URC RAS, October Avenue 151, 450075 Ufa, Russia
| | - P. Papp
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina F2, 84248 Bratislava, Slovak Republic
| | - M. Danko
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina F2, 84248 Bratislava, Slovak Republic
| | - M. Lacko
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina F2, 84248 Bratislava, Slovak Republic
| | - J. Blaško
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina F2, 84248 Bratislava, Slovak Republic
| | - Š. Matejčik
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina F2, 84248 Bratislava, Slovak Republic
| | - A. Modelli
- Dipartimento di Chimica “G. Ciamician,” Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
- Centro Interdipartimentale di Ricerca in Scienze Ambientali, Università di Bologna, Via S. Alberto 163, 48100 Ravenna, Italy
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