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Campo DC | Valor | Idioma |
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dc.contributor.author | Ferreira, Sergio Luis Costa | - |
dc.contributor.author | Lemos, Valfredo Azevedo | - |
dc.contributor.author | Santelli, Ricardo Erthal | - |
dc.contributor.author | Ganzarolli, Edgard | - |
dc.contributor.author | Curtius, Adilson José | - |
dc.creator | Ferreira, Sergio Luis Costa | - |
dc.creator | Lemos, Valfredo Azevedo | - |
dc.creator | Santelli, Ricardo Erthal | - |
dc.creator | Ganzarolli, Edgard | - |
dc.creator | Curtius, Adilson José | - |
dc.date.accessioned | 2013-01-10T12:42:58Z | - |
dc.date.issued | 2001 | - |
dc.identifier.issn | 0026-265X | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/7786 | - |
dc.description | Texto completo: acesso restrito. p. 41–46 | pt_BR |
dc.description.abstract | The use of Amberlite XAD-2 modified by 2-(2-benzothiazolylazo)-2-p-cresol (BTAC) as a sorbent in an on-line pre-concentration system for lead determination has been proposed. The procedure is based on the sorption of lead(II) ions onto a minicolumn packed with modified Amberlite XAD-2, followed by elution with 0.10 mol l−1 hydrochloric acid and determination by flame atomic absorption spectrometry. The on-line flow system uses four three-way solenoid valves and is electronically controlled in a time-based mode. Chemical and flow variables were optimized. The results demonstrated that sample solutions containing lead(II) in the concentration range from 3.7 to 300.0 μg l−1 in a solution of pH between 6.5 and 8.5 could be determined, using a pre-concentration time of 2 min. The enrichment factor was 27 for a sample volume of 4.50 ml. The limit of detection was 3.7 μg l−1. The relative standard deviations (R.S.D.) were in the range of 4.4–2.3% for lead concentrations from 50.0 to 300.0 μg l−1, respectively. The method was tolerant to other ions usually present in biological samples. Good accuracy was assured by the analysis of biological reference materials. | pt_BR |
dc.language.iso | en | pt_BR |
dc.source | http://dx.doi.org/10.1016/S0026-265X(00)00166-1 | pt_BR |
dc.subject | Flame atomic absorption spectrometry | pt_BR |
dc.subject | Flow injection system | pt_BR |
dc.subject | Amberlite XAD-2 | pt_BR |
dc.subject | 2-(2-benzothiazolylazo)-2-p-cresol | pt_BR |
dc.subject | Lead | pt_BR |
dc.title | An automated on-line flow system for the pre-concentration and determination of lead by flame atomic absorption spectrometry | pt_BR |
dc.title.alternative | Microchemical Journal | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | v. 68, n. 1 | pt_BR |
dc.embargo.liftdate | 10000-01-01 | - |
Aparece nas coleções: | Artigo Publicado em Periódico (Química) |
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