Téléchargement | - Voir le manuscrit accepté : Negative chemical ionization GC/MS determination of nitrite and nitrate in seawater using exact matching double spike isotope dilution and derivatization with triethyloxonium tetrafluoroborate (PDF, 912 Kio)
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DOI | Trouver le DOI : https://doi.org/10.1021/ac2030128 |
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Auteur | Rechercher : Pagliano, Enea1; Rechercher : Meija, Juris1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535; Rechercher : Sturgeon, Ralph E.1; Rechercher : Mester, Zoltan1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615; Rechercher : D’Ulivo, Alessandro |
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Affiliation | - Conseil national de recherches du Canada
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Format | Texte, Article |
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Résumé | The alkylation of nitrite and nitrate by triethyloxonium tetrafluoroborate allows determination of their ethyl esters by headspace GC–MS. In the present study, significant improvement in analytical performance are achieved by using negative chemical ionization (CI–). Detection limits are improved for at least an order of magnitude than those achieved using electron impact ionization (EI). The derivatization procedure has been optimized and alkaline conditions are adopted to minimize the conversion of nitrite to nitrate (determined to be 0.07% at 100 mg/L NO2–) and to avoid the exchange of oxygen between the analytes and the solvent (water). Quantitation entails the use of isotopically enriched standards (N18O2– and 15NO3–), which also permits monitoring of potential conversion from nitrite to nitrate during the analysis (double spike isotope dilution). |
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Date de publication | 2012-03-06 |
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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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Numéro NPARC | 21268854 |
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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 | e12d8c8e-0d51-41e9-9fc6-e8d7d3d3731f |
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Enregistrement créé | 2013-11-15 |
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Enregistrement modifié | 2020-06-04 |
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