DOI | Trouver le DOI : https://doi.org/10.1016/j.talanta.2011.07.098 |
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Auteur | Rechercher : Pagliano, E.; Rechercher : Onor, M.; Rechercher : Pitzalis, E.; Rechercher : Mester, Z.1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615; Rechercher : Sturgeon, R.E.1; Rechercher : D'Ulivo, A. |
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Affiliation | - Conseil national de recherches du Canada. Institut des étalons nationaux de mesure du CNRC
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Format | Texte, Article |
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Sujet | certified reference materials; certified values; chromatography-mass spectrometry; derivatizations; gas chromatography mass spectrometry; headspace SPME; headspaces; instrumental detection; internal standards; isotopically enriched; micromolar level; nitrite; simultaneous determinations; tetrafluoroborates; vapor generation; isotopes; mass spectrometry; nitrates; nitrogen oxides; seawater; water analysis; gas chromatography |
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Résumé | Triethyloxonium tetrafluoroborate derivatization combined with direct headspace (HS) or SPME-gas chromatography-mass spectrometry (GC-MS) is proposed here for the simultaneous determination of nitrite and nitrate in seawater at micromolar level after conversion to their corresponding volatile ethyl-esters (EtO-NO and EtO-NO2). Isotopically enriched nitrite [15N] and nitrate [15N] are employed as internal standards and for quantification purposes. HS-GC-MS provided instrumental detection limits of 0.07 μM NO2 - and 2 μM NO3 -. Validation of the methodology was achieved by determination of nitrite and nitrate in MOOS-1 (Seawater Certified Reference Material for Nutrients, NRC Canada), yielding results in excellent agreement with certified values. All critical aspects connected with the potential inter-conversion between nitrite and nitrate (less than 10%) were evaluated and corrected for by the use of the isotopically enriched internal standard. © 2011 Elsevier B.V. All rights reserved. |
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Date de publication | 2011 |
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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 | 21271615 |
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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 | e861c8de-40eb-4dcd-99a5-6d5481242b92 |
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Enregistrement créé | 2014-03-24 |
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Enregistrement modifié | 2020-04-21 |
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