Planejamento fatorial e superfície de resposta: otimização de um método voltamétrico para a determinação de ag(i) empregando um eletrodo de pasta de nanotubos de carbono
| Autor: | Fernando Campanhã Vicentini, Luiz Carlos Soares Figueiredo-Filho, Bruno C. Janegitz, Aline Santiago, Edenir Rodrigues Pereira-Filho, Orlando Fatibello-Filho |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 34, Iss 5, Pp 825-830 (2011) |
| Druh dokumentu: | article |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.1590/S0100-40422011000500018 |
| Popis: | A factorial design applied in a voltammetric stripping method for the measurement of Ag(I) in natural water is described. The procedure is based on the effective pre-concentration of silver ions on electrode surface. The calibration graph was linear in the silver concentration range from 7.92 x 10"7 to 1.07 x 10"5 mol L"1 with a detection limit of 3.81 x 10-7 mol L-1. The determination of Ag(I) in natural water samples was carried out satisfactory with the proposed electrode. |
| Databáze: | Directory of Open Access Journals |
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