| DOI | Trouver le DOI : https://doi.org/10.1007/s0021663560416 |
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| Auteur | Rechercher : Liu, J.1; Rechercher : Sturgeon, R.1; Rechercher : Boyko, V. J.1; Rechercher : Willie, S. N.1 |
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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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| Résumé | The determination of Cr in National Research Council of Canada Marine Sediment Reference Material BCSS-1 is addressed. Mixed acid digestions utilizing HF, HClO4 and HNO3 were investigated. Single microwave assisted digestions in closed vessels at medium pressures (8 bar) were inappropriate (80% recovery). Double digestion at moderate pressure and digestions at high pressure (70 bar) or lengthy open-beaker hot plate dissolutions resulted in 93±5% recovery of certified Cr content. Flame atomic absorption and inductively coupled plasma atomic emission spectrometry were used for quantitation. In all cases, the method of standard additions was necessary to eliminate the approximately 10% enhancement in re- sponce relative to unmatched standards. Compared to a certified content of 123±7 μg/g (mean and standard deviation), values of 116±6 were obtained using an open beaker digestion; 114±5 using a double microwave digestion at 8 bar; 113±2 for microwave digestion at high pressure and 111±4 at high pressure (81 bar) with triple microwave digestion in a Parr bomb. No acid dissolution procedure is adequate for Cr in this sample although recovery of total Cr is complete from National Institute of Standards and Technology Buffalo River Sediment (SRM 2704). |
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| Date de publication | 1996 |
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| Dans | |
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| Langue | anglais |
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| Numéro du CNRC | NRC-INMS-1274 |
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| Numéro NPARC | 5765117 |
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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 | aefe455e-465c-40ed-a3be-62f867ec147d |
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| Enregistrement créé | 2009-03-29 |
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| Enregistrement modifié | 2020-03-20 |
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