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| DOI | Trouver le DOI : https://doi.org/10.1007/s00216-019-01803-4 |
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| Auteur | Rechercher : Pagliano, Enea1; Rechercher : Meija, Juris1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535; Rechercher : Campanella, Beatrice; Rechercher : Onor, Massimo; Rechercher : Iammarino, Marco; Rechercher : D’amore, Teresa; Rechercher : Berardi, Giovanna; Rechercher : D’imperio, Massimiliano; Rechercher : Parente, Angelo; Rechercher : Mihai, Ovidiu1; Rechercher : Mester, Zoltán1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615 |
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| Affiliation | - Conseil national de recherches Canada. Centre de recherche en métrologie
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| Format | Texte, Article |
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| Sujet | certified reference material; dietary nitrate; leafy vegetable; isotope dilution |
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| Résumé | A high-precision exact-matching quadruple isotope dilution method (ID4MS) was employed for the quantitation of nitrate in an air-dried spinach powder Certified Reference Material (CRM). The analyte was extracted in hot water following addition of ¹⁵NO⁻₃ internal standard. The blend was then treated with sulfamic acid to remove nitrite and with triethyloxonium tetrafluoroborate to promote aqueous conversion of nitrate into volatile EtONO₂. The derivative was analyzed by headspace GC–MS with 3-min elution time. The method performance was validated with a series of tests which demonstrated adequate selectivity and ruggedness. This method supported the development of novel SPIN₋₁ CRM giving a modest contribution to its uncertainty (uchar = 0.85%). With respect to previous attempts, the SPIN was proven stable, homogeneous (uhom = 0.44%), and suitable for spinach monitoring under EU regulations. On dried basis, the nitrate content of SPINU regulations. On dried basis, the nitrate content of SPIN₋₁ was found to be 22.53 ± 0.43 mg/g (Uc = 1.9%, k = 2). The material was also used in an inter-laboratory study where four laboratories employed a total of ten measurement methods. |
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| Date de publication | 2019-05-15 |
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| Maison d’édition | Springer |
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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 | f4928323-dae5-41b9-9f2e-e4f876889f92 |
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| Enregistrement créé | 2021-02-05 |
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| Enregistrement modifié | 2024-09-24 |
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