Title: Suitable solid state chemical sensor for HCHO determination

Authors: L. Campanella, M. Battilotti, R. Dragone, I. Mevola

Addresses: Department of Chemistry, University 'La Sapienza', P.le Aldo Moro, 5 00185, Rome, Italy. ' Department of Chemistry, University 'La Sapienza', P.le Aldo Moro, 5 00185, Rome, Italy. ' Institute of Complexes Systems, National Research Council, CNR of Rome, Italy. ' Department of Chemistry, University 'La Sapienza', P.le Aldo Moro, 5 00185, Rome, Italy

Abstract: A solid state NiO-polyaniline mixture electrode is proposed and characterised to determine formaldehyde. The influence of ionic strength is particularly significant. The response is slow, so a waiting time, optimised at 90 min is needed, thus preventing a continuous or in-flow condition determination. Some common environmental possible interfering analytes have been tested, the most interfering having been shown to be acetaldehyde that cannot be present at concentration higher than 10^-6.

Keywords: chemical sensors; formaldehyde; nickel oxide; polyaniline.

DOI: 10.1504/IJEP.2006.010575

International Journal of Environment and Pollution, 2006 Vol.27 No.4, pp.313 - 323

Published online: 02 Aug 2006 *

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