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Coupling of supercritical fluid chromatography to mass spectrometry for the analysis of Dechlorane Plus: Examination of relevant negative ion atmospheric pressure chemical ionization mechanisms
Örebro University, School of Science and Technology. Wellington Laboratories Inc., Guelph Ontario, Canada. (Man-Technology-Environment Research Centre)
Örebro University, School of Science and Technology. Norwegian Institute for Water Research, Oslo, Norway. (Man-Technology-Environment Research Centre)ORCID iD: 0000-0001-6217-8857
Örebro University, School of Science and Technology. (Man-Technology-Environment Research Centre)ORCID iD: 0000-0002-6330-789X
Chemistry Department, University of Guelph, Guelph ON, Canada.
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2017 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 171, p. 68-73Article in journal (Refereed) Published
Abstract [en]

During an investigation of the potential associated with coupling packed column supercritical fluid chromatography (pSFC) to mass spectrometry for the analysis of Dechlorane Plus and related compounds, it was found that negative ion atmospheric pressure chemical ionization (APCI) was a promising ionization technique. In the course of maximizing the responses associated with the target analytes, it proved useful to examine some aspects of the complex nature and reactivity of the corona discharge plasma generated to explain the observed ionization products. Various dopants/reagents were screened for both APCI and atmospheric pressure photoionization (APPI) in negative ion mode and mechanisms of ionization involving superoxide were elucidated based on the results obtained. Superoxide formation was found to be temperature dependent and directly related to the intensity of the ion cluster [M-Cl+O](-) obtained for the target DP analytes. Furthermore, triethylamine was identified as a reagent capable of suppressing unwanted side reactions during the ionization process and maximizing response associated with the analytes of interest. The applicability of pSFC-APCI/MS for the separation and detection of Dechlorane Plus and related compounds was demonstrated by analyzing Lake Ontario sediment and comparing the results with values reported in the scientific literature.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 171, p. 68-73
Keywords [en]
Supercritical fluid chromatography, Negative, APCI/MS, Dechlorane Plus, Ionization, Superoxide, Environmental analysis
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-58921DOI: 10.1016/j.talanta.2017.04.066ISI: 000403511500010PubMedID: 28551155Scopus ID: 2-s2.0-85018946787OAI: oai:DiVA.org:oru-58921DiVA, id: diva2:1134786
Available from: 2017-08-21 Created: 2017-08-21 Last updated: 2017-10-05Bibliographically approved

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Riddell, Nicolevan Bavel, BertEricson Jogsten, Ingrid

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