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Issue 23, 2014
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Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples

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Abstract

We have developed a simple, fast, portable, inexpensive, and indirect method for the determination of water in ethanol fuels. The addition of an excess amount of water is the most simple and common method of adulterating these fuels. Such procedure can adversely affect the performance of the vehicle. Our system uses a laboratory-made photometry device to monitor the formation of complexes between ethanol and cerium(IV). These reactions produce deep orange–red solutions. The limit of detection and the analytical sensitivity were estimated to be 0.22% v/v (water in ethanol) and 0.11 (% v/v)−1, respectively. The developed platform was satisfactorily robust with respect to the changes in temperature and stability of the reagents during storage. The measurements were accurate at the 95% confidence level compared with data obtained by Karl Fischer titration.

Graphical abstract: Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples

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Publication details

The article was received on 24 Sep 2014, accepted on 03 Oct 2014 and first published on 06 Oct 2014


Article type: Technical Note
DOI: 10.1039/C4AY02255F
Author version available: Download Author version (PDF)
Citation: Anal. Methods, 2014,6, 9497-9502
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    Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples

    G. F. Giordano, D. C. Melo Ferreira, T. Ribeiro de Carvalho, L. C. Silveira Vieira, M. Helena de Oliveira Piazzetta, R. S. Lima and A. L. Gobbi, Anal. Methods, 2014, 6, 9497
    DOI: 10.1039/C4AY02255F

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