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Novel ethyl-derivatization approach for the determination of fluoride by headspace gas chromatography/mass spectrometry

Par Conseil national de recherches du Canada

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DOITrouver le DOI : https://doi.org/10.1021/ac302303r
AuteurRechercher : 1; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535; Rechercher : 2; Rechercher : 1; Rechercher : ; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615
Affiliation
  1. Conseil national de recherches du Canada. Science des mesures et étalons
  2. Conseil national de recherches du Canada. Technologies de sécurité et de rupture
FormatTexte, Article
Sujetadverse effect; batch reactions; certified reference materials; closed vessels; derivatizations; fluoride ion; gas chromatography/Mass spectrometry; headspace gas chromatography; headspaces; limit of detection; linear range; non-volatile; one-step reactions; standard addition; tap water; tetrachloroferrate; chromatography; iron compounds; organic solvents; seawater; spectrometry
Résumé
We report a novel derivatization chemistry for determination of fluoride based on the batch reaction of fluoride ions with triethyloxonium tetrachloroferrate(III) in a closed vessel to yield fluoroethane. Gaseous fluoroethane was readily separated from the matrix, sampled from the headspace, and determined by gas chromatography/mass spectrometry. The method was validated using rainwater certified reference material (IRMM CA408) and subsequently applied to the determination of fluoride in various matrixes, including tap water, seawater, and urine. An instrumental limit of detection of 3.2 μg/L with a linear range up to 50 mg/L was achieved. The proposed derivatization is a one-step reaction, requires no organic solvents, and is safe, as the derivatizing agent is nonvolatile. Determination of fluoride is affected by common fluoride-complexing agents, such as Al(III) and Fe(III). The effect of large amounts of these interferences was studied, and the adverse effect of these ions was eliminated by use of the method of standard additions.
Date de publication
Dans
  • Analytical Chemistry 85, nº 2 : 877–881.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21270353
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Identificateur de l’enregistrement09525e2a-5f5b-486b-8ef4-838601e78703
Enregistrement créé2014-02-04
Enregistrement modifié2020-06-04
Date de modification :