Voltammetric determination of total iron in fuel ethanol using a 1,10 fenantroline/nafion carbon paste-modified electrode
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/03/2008
|
Resumo |
This work presents a methodology for iron determination in fuel ethanol using a modified carbon paste electrode with 1.10 fenantroline/nafion. The electrochemical parameters were optimized for the proposed system and the voltammetric technique of square wave was employed for iron determination. An accumulation time of 5 minutes, such as a 100 mV of pulse magnitude (E(sw)) and frequency (f) of 25 Hz were used as optimized experimental conditions. The modified carbon paste electrode presented linear dependence of amperometric signal with iron concentration in a work range from 6.0x10(-6) until 2.0x10(-5) mol L(-1) of iron, exhibiting a linear correlation coefficient of 0.9884, a detection limit of 2.4 x10(-6) mol L(-1) (n = 3) and amperometric sensibility of 4.5x10(5) mu A/mol L(-1). Analytical curve method was used for iron determination at a commercial fuel sample. Flame atomic absorption spectroscopy was employed as comparative technique. |
Formato |
338-345 |
Identificador |
http://www.electrochemsci.org/papers/vol3/3030338.pdf International Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 3, n. 3, p. 338-345, 2008. 1452-3981 http://hdl.handle.net/11449/10145 WOS:000256383800011 WOS000256383800011.pdf |
Idioma(s) |
eng |
Publicador |
Electrochemical Science Group |
Relação |
International Journal of Electrochemical Science |
Direitos |
openAccess |
Palavras-Chave | #iron #fuel ethanol #carbon paste electrode #1,10 fenantroline #square wave voltammetry |
Tipo |
info:eu-repo/semantics/article |