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A rapid and sensitive method for the determination of inorganic chloride in oil samples

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/j.aca.2019.02.055
AuthorSearch for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0002-2377-2615; Search for: 1
Affiliation
  1. National Research Council of Canada. Metrology Research Centre
FormatText, Article
Subjectinorganic chloride; fuel oil; isotope dilution; gas chromatography mass spectrometry
Abstract
A novel isotope dilution method for the analysis of inorganic chloride in fuel oil matrix is presented. The samples were diluted by isopropyl alcohol:toluene, mixed with 37Cl− internal standard and reacted with triethyloxonium tetrafluoroborate at room temperature. This reagent promoted conversion of Cl− into stable ethyl chloride (EtCl) which was selectively detected by headspace GC–MS/MS with no matrix effects. A limit of detection of 0.2 mg kg−1 Cl− was obtained in fuel oil. The method was tested on the NIST SRM 1634c (trace elements in residual fuel oil) and validated through a series of robustness tests. Over 18 days, the variation in the signal response was less than 10% and the RSD for quantitative isotope dilution results was below 3%. Overall, the method is fast, simple and allows robust quantitation of inorganic chloride directly in the non-aqueous media.
Publication date
PublisherElsevier
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In
  • Analytica Chimica Acta 1064 (8 August 2019): 40–46.
LanguageEnglish
Peer reviewedYes
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Record identifierf3a13840-72ac-4860-b87d-18fa8bf2fa87
Record created2019-05-06
Record modified2024-08-20
Date modified: