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Campo DC | Valor | Idioma |
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dc.contributor.author | Dittert, Ingrid M. | - |
dc.contributor.author | Maranhão, Tatiane A. | - |
dc.contributor.author | Borges, Daniel L. G. | - |
dc.contributor.author | Vieira, Mariana A. | - |
dc.contributor.author | Welz, Bernhard | - |
dc.contributor.author | Curtius, Adilson José | - |
dc.creator | Dittert, Ingrid M. | - |
dc.creator | Maranhão, Tatiane A. | - |
dc.creator | Borges, Daniel L. G. | - |
dc.creator | Vieira, Mariana A. | - |
dc.creator | Welz, Bernhard | - |
dc.creator | Curtius, Adilson José | - |
dc.date.accessioned | 2014-01-21T14:34:56Z | - |
dc.date.issued | 2007 | - |
dc.identifier.issn | 0039-9140 | - |
dc.identifier.uri | http://repositorio.ufba.br/ri/handle/ri/14402 | - |
dc.description | Texto completo: acesso restrito. p. 1786-1790 | pt_BR |
dc.description.abstract | Method development for the pre-concentration of mercury in human hair, dogfish liver and dogfish muscle samples using cloud-point extraction and cold vapor atomic absorption spectrometry is demonstrated. Before the extraction, the samples were submitted to microwave-assisted digestion in a mixture of H2O2 and HNO3. Cloud point extraction was carried out using 0.5% (m/v) ammonium O,O-diethyldithiophosphate (DDTP) as the chelating agent and 0.3% (m/v) Triton X-114 as the non-ionic surfactant. Phase separation was induced after the addition of Na2SO4 to a final concentration of 0.2 mol L−1. Aliquots of the final extract were transferred to PTFE tubes and NaBH4 and HCl were added. The mercury vapor was driven to a non-heated quartz tube for measuring the absorbance. The results obtained with salt-induced phase separation were in good agreement with the certified values at a 95% confidence level. An enrichment factor of 10 allowed a detection limit of 0.4 ng g−1 to be obtained, which demonstrates the high sensitivity of the proposed procedure for the determination of mercury at trace levels. | pt_BR |
dc.language.iso | en | pt_BR |
dc.rights | Acesso Aberto | pt_BR |
dc.source | http://dx.doi.org/10.1016/j.talanta.2007.02.012 | pt_BR |
dc.subject | Cloud point extraction | pt_BR |
dc.subject | Cold vapor atomic absorption spectrometry | pt_BR |
dc.subject | Mercury | pt_BR |
dc.subject | Biological samples | pt_BR |
dc.subject | O,O-diethyl dithiophosphate | pt_BR |
dc.subject | Triton X-114 | pt_BR |
dc.title | Determination of mercury in biological samples by cold vapor atomic absorption spectrometry following cloud point extraction with salt-induced phase separation | pt_BR |
dc.title.alternative | Talanta | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | v. 72, n. 5 | pt_BR |
dc.embargo.liftdate | 10000-01-01 | - |
Aparece nas coleções: | Artigo Publicado em Periódico (Química) |
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1-s2.0-S0039914007001403-main.pdf | 321,34 kB | Adobe PDF | Visualizar/Abrir |
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