| Téléchargement | - Voir la version finale : Selective gas chromatography mass spectrometry method for ultratrace detection of selenocyanate (PDF, 471 Kio)
- Voir les données supplémentaires : Selective gas chromatography mass spectrometry method for ultratrace detection of selenocyanate (PDF, 156 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/acs.analchem.9b02615 |
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| Auteur | Rechercher : Pagliano, Enea1; Rechercher : Leblanc, Kelly L.1; Rechercher : Mester, Zoltán1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615 |
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| Affiliation | - Conseil national de recherches du Canada. Centre de recherche en métrologie
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| Format | Texte, Article |
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| Description physique | 5 p. |
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| Résumé | The recent interest in the determination of selenocyanate (SeCN⁻) in wastewater systems has spurred the development of analytical methods for its determination at the ultratrace level. Since most of the current procedures require complex and costly instrumental configurations, we have developed a simple and rapid gas chromatography tandem mass spectrometry (GC/MS/MS) method able to detect SeCN⁻ in water samples with a LOD of 0.1 ng/g Se. A 1 mL volume of aqueous sample was buffered with sodium bicarbonate and treated with triethyloxonium tetrafluoroborate for conversion of the analyte into volatile EtSeCN. The derivatization yield was higher than 90%, and it could tolerate concentrations of chloride or sulfate up to 2%. The EtSeCN was extracted in chloroform and could be detected in electron ionization and also in negative chemical ionization mode with a further gain in signal-to-noise ratio by a factor of 2. The method was applied for the analysis of natural waters with quantitation of SeCN⁻ in the low ng/g region. The Se¹³C¹⁵N⁻ internal standard could be used for isotope dilution. Quantitative spike recoveries of 1 ng/g Se were obtained from seawater and river water, and 1 ng/g Se could be quantified within a standard uncertainty of 15%. |
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| Date de publication | 2019-08-29 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | eaa20df3-9323-4f48-92e2-47d6d1795f5d |
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| Enregistrement créé | 2019-09-26 |
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| Enregistrement modifié | 2020-05-30 |
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