Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/11261
Título: An alternative method for the simultaneous determination of copper and lead for quality control of sugar cane spirit using a nanotube-based sensor
Palavras-chave: Copper
Lead
Carbon paste electrode
Multi-walled carbon nanotubes
Ascorbic acid
Squarewave voltammetry
Sugar cane spirit
Data do documento: 15-Jun-2016
Editor: Sociedade Brasileira de Química
Citação: TAVARES, E. de F. L. et al. An alternative method for the simultaneous determination of copper and lead for quality control of sugar cane spirit using a nanotube-based sensor. Journal of the Brazilian Chemical Society, São Paulo, v. 23, n. 9, Sept. 2012.
Resumo: The development of an electroanalytical method for simultaneous determination of copper and lead ions in sugar cane spirit (cachaça) using carbon paste electrode modified with ascorbic acid and carbon nanotubes (CPE-AaCNT) is described. Squarewave voltammetry (SWV) with anodic stripping was employed, and this technique was optimized with respect to the following parameters: frequency (50 Hz), amplitude (100 mV) and scan increment (9 mV). The analytical curves were linear in the range from 0.0900 to 7.00 mg L - 1 for lead and copper. The limits of detection were 48.5 and 23.9 µg L - 1 for lead and copper, respectively. The developed method was applied to the simultaneous determination of copper and lead in five commercial samples of sugar cane spirit. The results were in good agreement with those obtained by F AAS/GF AAS (flame atomic absorption spectrometry/graphite furnace atomic absorption spectrometry) and showed that CPE-AaCNT can be successfully employed in the simultaneous determination of these metals in real sugar cane spirit samples.
URI: http://www.scielo.br/pdf/jbchs/v23n9/aop058_12.pdf
http://repositorio.ufla.br/jspui/handle/1/11261
Aparece nas coleções:DQI - Artigos publicados em periódicos

Arquivos associados a este item:
Não existem arquivos associados a este item.


Este item está licenciada sob uma Licença Creative Commons Creative Commons