Levels of Metallic Cations in the Surface Sediments in the Vicinity of the Três Marias Dam Lake (Brazil) Determined by ICP-MS and Microwave Sample Preparation
| Autor: | Alex Campos Divino, Virginia S. T. Ciminelli, Roberta F. Silva, Aparecida M. S. Mimura, Júlio César José da Silva, Ronaldo Amorim Júnior |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Soil and Sediment Contamination: An International Journal. 23:257-269 |
| ISSN: | 1549-7887 1532-0383 |
| DOI: | 10.1080/15320383.2014.820166 |
| Popis: | The presence of toxic elements in sediments is critical in the State of Minas Gerais, which is an important mining area in Brazil. In this work, Ag, As, Ba, Cd, Co, Cr, Cs, Cu, Ga, In, Li, Ni, Pb, Sr, Tl, V and Zn were determined in samples of sediments by ICP-MS after microwave sample preparation. The samples of surface sediments were collected from the vicinity of Tres Marias Dam, Brazil. The results using HNO3+HF+H3BO3 and a microwave oven presented adequate precision and accuracy. The accuracy of the method was determined using different certified reference materials. Most of the results agreed within a 95% confidence level. The concentrations of the investigated analytes were below the values of Threshold Effect Level (TEL) and Probable Effect Level (PEL), with the exception of cadmium, chromium, copper, nickel, and zinc. High concentrations of Cr were observed at all the points, Cu and Ni at point SF 011, Cd at point SF 015, and Zn at points SF 011, SF 013, and SF 015. The results demonstrate that t... |
| Databáze: | OpenAIRE |
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