| Téléchargement | - Voir le manuscrit accepté : Detection of bromine by ICP-oa-ToF-MS following photochemical vapor generation (PDF, 934 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/ac504747a |
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| Auteur | Rechercher : Sturgeon, Ralph E.1 |
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| Affiliation | - Conseil national de recherches du Canada. Science des mesures et étalons
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| Format | Texte, Article |
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| Sujet | Bituminous coal; Bromine; Groundwater; Isotopes; Detection limits; Inductively coupled plasma (ICP); Irradiation time; Photochemical reactor; Reference material; Replicate measurements; Transport efficiency; Volatile products; Inductively coupled plasma |
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| Résumé | A unique flow-through photochemical reactor is utilized for the generation of volatile methyl bromide from aqueous solutions of bromide and bromate ions in a medium of 2% acetic acid containing 3000 μg/mL NH4Cl. The volatile product is transported to a thin-film gas-liquid phase separator and directed to an inductively coupled plasma (ICP) tine-of-flight mass spectrometer for detection and quantitation using either of the 79Br or 81Br isotopes. Utilizing a sample flow rate of 3.3 mL/min and a 13 s irradiation time, a detection limit of 0.14 ng/mL is achieved, yielding a 17-fold enhancement over conventional solution nebulization. The estimated generation efficiency of 95% provides for a significant increase in analyte transport efficiency to the ICP. Precision of replicate measurement is 2.5% (RSD) at 20 ng/mL. The methodology was validated by successful determination of bromine in reference materials, including IRMM (BCR-611) low level bromide in groundwater, NIST SRM 1568b Rice Flour, and SRM 1632 bituminous coal. |
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| Date de publication | 2015-02-04 |
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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 | 21275830 |
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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 | bc1aefd0-1cac-4eb4-996c-f2c26e0c4aea |
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| Enregistrement créé | 2015-07-14 |
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| Enregistrement modifié | 2020-06-04 |
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