| Revista: | Ecletica quimica |
| Base de datos: | |
| Número de sistema: | 000552674 |
| ISSN: | 0100-4670 |
| Autores: | de Souza, João Carlos1 Toci, Aline Theodoro2 Beluomini, Maísa Azevedo1 Eiras, Sebastião de Paula3 |
| Instituciones: | 1Universidade Estadual Paulista "Júlio de Mesquita Filho" – UNESP - Instituto de Química, Departamento de Química Analítica, Rua Prof. Francisco Degni, 55, Araraquara-SP, CEP 14800-060, 2Universidade Federal da Integração Latino Americana, Centro de Ciências da Natureza, Avenida Silvio Américo Sasdelli, 1842, CEP 85867-970, Foz do Iguaçu-PR, 3Universidade Federal de Uberlândia, Campus Santa Mônica, Instituto de Química, Departamento de Química Analítica, Av. João Naves de Ávila, 2121, Uberlândia-MG, CEP 38400-902, |
| Año: | 2017 |
| Volumen: | 42 |
| Número: | 1 |
| Paginación: | 33-39 |
| País: | Brasil |
| Idioma: | Inglés |
| Resumen en inglés | The present work describes the use of a homogeneous ternary mixture of the solvents water, ethanol, and acetone to improve the determination of copper in sugarcane spirit by flame atomic absorption spectrometry. The solvent ratio used (on a volume basis) was 5.0:5.0:15.0 (water:ethanol:acetone). The analytical curve for copper was linear up to a concentration of 6.00 mg L-1 of copper, and could be described by the equation: Δabs = 0.1778CCu + 0.0048 (r2 = 0.9999), and limits of detection and quantification (calculated using the standard deviation of the blank) were 0.01 and 0.05 mg L-1 of copper, respectively. Use of the proposed homogeneous ternary solvent system provided good stability and a significant increase in sensitivity compared to reference methodology. This increase in sensitivity enables the detection of smaller quantities of copper in sugarcane spirit. The method was applied to determine copper in commercial brands of sugarcane spirits. The results obtained by the proposed method were favorably compared with those given by the reference method. |
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