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http://hdl.handle.net/2445/155739
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DC Field | Value | Language |
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dc.contributor.author | Ponsin, V. | - |
dc.contributor.author | Torrentó Aguerri, Clara | - |
dc.contributor.author | Lihl, C. | - |
dc.contributor.author | Elsner, M. | - |
dc.contributor.author | Hunkeler, D. | - |
dc.date.accessioned | 2020-04-17T09:30:32Z | - |
dc.date.available | 2020-11-19T06:10:23Z | - |
dc.date.issued | 2019-11-19 | - |
dc.identifier.issn | 0003-2700 | - |
dc.identifier.uri | http://hdl.handle.net/2445/155739 | - |
dc.description.abstract | A gas chromatography-single quadrupole mass spectrometry method was developed and validated for compound-specific chlorine isotope analysis (Cl-CSIA) of three chlorinated herbicides, atrazine, acetochlor, and metolachlor, which are widespread contaminants in the environment. For each compound, the two most abundant ions containing chlorine (202/200 for atrazine, 225/223 for acetochlor, and 240/238 for metolachlor) and a dwell time of 30 ms were determined as optimized MS parameters. A limit of precise isotope analysis for ethyl acetate solutions of 10 mg/L atrazine, 10 mg/L acetochlor, and 5 mg/L metolachlor could be reached with an associated uncertainty between 0.5 and 1 . To this end, samples were measured 10-fold and bracketed with two calibration standards that covered a wide range of δ37Cl values and for which amplitudes matched those of the samples within 20% tolerance. The method was applied to investigate chlorine isotope fractionation during alkaline hydrolysis of metolachlor, which showed a shift in δ37Cl of +46 after 98% degradation, demonstrating that chlorine isotope fractionation could be a sensitive indicator of transformation processes even when limited degradation occurs. This method, combined with large-volume solid-phase extraction (SPE), allowed application of Cl-CSIA to environmentally relevant concentrations of widespread herbicides (i.e., 0.5-5 μg/L in water before extraction). Therefore, the combination of large-volume SPE and Cl-CSIA is a promising tool for assessing the transformation processes of these pollutants in the environment. | - |
dc.format.extent | 9 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Chemical Society | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1021/acs.analchem.9b02497 | - |
dc.relation.ispartof | Analytical Chemistry, 2019, vol. 91, num. 22, p. 14290-14298 | - |
dc.relation.uri | https://doi.org/10.1021/acs.analchem.9b02497 | - |
dc.rights | (c) American Chemical Society , 2019 | - |
dc.source | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) | - |
dc.subject.classification | Plaguicides | - |
dc.subject.classification | Isòtops | - |
dc.subject.other | Pesticides | - |
dc.subject.other | Isotopes | - |
dc.title | Compound-Specific Chlorine Isotope Analysis of the Herbicides Atrazine, Acetochlor, and Metolachlor | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 694129 | - |
dc.date.updated | 2020-04-17T09:30:33Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) |
Files in This Item:
File | Description | Size | Format | |
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694129.pdf | 609.12 kB | Adobe PDF | View/Open |
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