| Journal: | Journal of the Brazilian Chemical Society |
| Database: | PERIÓDICA |
| System number: | 000311935 |
| ISSN: | 0103-5053 |
| Authors: | Ganjali, Mohammad Reza1 Norouzi, Parviz Alizadeh, Taher Adib, Mehdi |
| Institutions: | 1Tehran University, Department of Chemistry, Teherán. Irán |
| Year: | 2006 |
| Season: | Dic |
| Volumen: | 17 |
| Number: | 7 |
| Pages: | 1217-1222 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | A highly selective and sensitive plasticized membrane sensor for Ag+ ions based on 2-methyl-2,4-di(2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine (MTHB) as membrane carrier was prepared. The sensor shows a linear dynamic range of 1.0 × 10-6 -1.0 × 10-1 mol L-1, with a Nernstian slope of (58.5±0.3) mV decade-1, and a detection limit of 5.0 × 10-7 mol L-1 (~54 ppb). It has a fast response time of 10 s and can be used for at least eight weeks without any considerable divergences in its potentials. The proposed sensor revealed very good selectivities with respect to the most of common metal ions. The proposed sensor could be used in a pH range of 4.0-8.0. It was successfully used as an indicator electrode in potentiometric titration of Ag+ with NaCl |
| Portuguese abstract | Uma membrana carregadora plastificada foi preparada a partir de 2-metil-2,4-di(2-tienil)-2,3-diidro-1H-1,5-benzodiazepina (MTHB). Esta membrana é altamente sensível e seletiva a íons Ag+. O sensor mostra um intervalo dinâmico linear de 1,0 × 10-6 1,0 × 10-1 mol L-1, com inclinação Nernstiniana de (58,5±0,3) mV per década, e limite de detecção 5,0 × 10-7 mol L-1 (~54 ppb). Apresenta rápido tempo de resposta, 10s, e pode ser usado por 8 semanas no mínimo, sem alterações consideráveis no seu potencial. O sensor proposto pode ser usado no intervalo de pH entre 4,0 e 8,0 e foi utilizado com sucesso, como eletrodo indicador, na titulação potenciométrica de Ag+ com NaCl |
| Disciplines: | Química |
| Keyword: | Química analítica, Química farmacéutica, Plata, Sensores de membrana, Potenciometría, Membranas de PVC |
| Keyword: | Chemistry, Analytical chemistry, Medicinal chemistry, Silver, Membrane sensors, Potentiometry, PVC membranes |
| Full text: | Texto completo (Ver HTML) |
