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dc.contributor.authorSchinkel, Lena-
dc.contributor.authorLehner, Sandro-
dc.contributor.authorKnobloch, Marco-
dc.contributor.authorLienemann, Peter-
dc.contributor.authorBogdal, Christian-
dc.contributor.authorMcNeill, Kristopher-
dc.contributor.authorHeeb, Norbert V.-
dc.date.accessioned2023-07-20T12:39:44Z-
dc.date.available2023-07-20T12:39:44Z-
dc.date.issued2018-
dc.identifier.issn0045-6535de_CH
dc.identifier.issn1879-1298de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/28260-
dc.description.abstractChlorinated paraffins (CPs) are high production volume chemicals widely used as additives in metal working fluids. Thereby, CPs are exposed to hot metal surfaces which may induce degradation processes. We hypothesized that the elimination of hydrochloric acid would transform CPs into chlorinated olefins (COs). Mass spectrometry is widely used to detect CPs, mostly in the selected ion monitoring mode (SIM) evaluating 2-3 ions at mass resolutions R < 20'000. This approach is not suited to detected COs, because their mass spectra strongly overlap with CPs. We applied a mathematical deconvolution method based on full-scan MS data to separate interfered CP/CO spectra. Metal drilling indeed induced HCl-losses. CO proportions in exposed mixtures of chlorotridecanes increased. Thermal exposure of chlorotridecanes at 160, 180, 200 and 220 °C also induced dehydrohalogenation reactions and CO proportions also increased. Deconvolution of respective mass spectra is needed to study the CP transformation kinetics without bias from CO interferences. Apparent first-order rate constants (kapp) increased up to 0.17, 0.29 and 0.46 h-1 for penta-, hexa- and heptachloro-tridecanes exposed at 220 °C. Respective half-life times (τ1/2) decreased from 4.0 to 2.4 and 1.5 h. Thus, higher chlorinated paraffins degrade faster than lower chlorinated ones. In conclusion, exposure of CPs during metal drilling and thermal treatment induced HCl losses and CO formation. It is expected that CPs and COs are co-released from such processes. Full-scan mass spectra and subsequent deconvolution of interfered signals is a promising approach to tackle the CP/CO problem, in case of insufficient mass resolution.de_CH
dc.language.isoende_CH
dc.publisherElsevierde_CH
dc.relation.ispartofChemospherede_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectChlorinated olefinsde_CH
dc.subjectChlorinated paraffinsde_CH
dc.subjectDeconvolution of mass spectrade_CH
dc.subjectFirst-order kineticsde_CH
dc.subjectThermal transformation productde_CH
dc.subjectAlkenesde_CH
dc.subjectEnvironmental monitoringde_CH
dc.subjectHot temperaturede_CH
dc.subjectHydrocarbons, Chlorinatedde_CH
dc.subjectKineticsde_CH
dc.subjectMass spectrometryde_CH
dc.subjectMetallurgyde_CH
dc.subjectParaffinde_CH
dc.subject.ddc660: Technische Chemiede_CH
dc.titleTransformation of chlorinated paraffins to olefins during metal work and thermal exposure : deconvolution of mass spectra and kineticsde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementLife Sciences und Facility Managementde_CH
zhaw.organisationalunitInstitut für Chemie und Biotechnologie (ICBT)de_CH
dc.identifier.doi10.1016/j.chemosphere.2017.11.168de_CH
dc.identifier.pmid29253825de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end811de_CH
zhaw.pages.start803de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume194de_CH
zhaw.publication.reviewPeer review (Abstract)de_CH
zhaw.author.additionalNode_CH
zhaw.display.portraitYesde_CH
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Schinkel, L., Lehner, S., Knobloch, M., Lienemann, P., Bogdal, C., McNeill, K., & Heeb, N. V. (2018). Transformation of chlorinated paraffins to olefins during metal work and thermal exposure : deconvolution of mass spectra and kinetics. Chemosphere, 194, 803–811. https://doi.org/10.1016/j.chemosphere.2017.11.168
Schinkel, L. et al. (2018) ‘Transformation of chlorinated paraffins to olefins during metal work and thermal exposure : deconvolution of mass spectra and kinetics’, Chemosphere, 194, pp. 803–811. Available at: https://doi.org/10.1016/j.chemosphere.2017.11.168.
L. Schinkel et al., “Transformation of chlorinated paraffins to olefins during metal work and thermal exposure : deconvolution of mass spectra and kinetics,” Chemosphere, vol. 194, pp. 803–811, 2018, doi: 10.1016/j.chemosphere.2017.11.168.
SCHINKEL, Lena, Sandro LEHNER, Marco KNOBLOCH, Peter LIENEMANN, Christian BOGDAL, Kristopher MCNEILL und Norbert V. HEEB, 2018. Transformation of chlorinated paraffins to olefins during metal work and thermal exposure : deconvolution of mass spectra and kinetics. Chemosphere. 2018. Bd. 194, S. 803–811. DOI 10.1016/j.chemosphere.2017.11.168
Schinkel, Lena, Sandro Lehner, Marco Knobloch, Peter Lienemann, Christian Bogdal, Kristopher McNeill, and Norbert V. Heeb. 2018. “Transformation of Chlorinated Paraffins to Olefins during Metal Work and Thermal Exposure : Deconvolution of Mass Spectra and Kinetics.” Chemosphere 194: 803–11. https://doi.org/10.1016/j.chemosphere.2017.11.168.
Schinkel, Lena, et al. “Transformation of Chlorinated Paraffins to Olefins during Metal Work and Thermal Exposure : Deconvolution of Mass Spectra and Kinetics.” Chemosphere, vol. 194, 2018, pp. 803–11, https://doi.org/10.1016/j.chemosphere.2017.11.168.


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