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Reference type: Journal
Authors: Alizadeh T, Rezaloo F
Article Title: Toluene chemiresistor sensor based on nano-porous toluene-imprinted polymer.
Publication date: 2013
Journal: International Journal of Environmental Analytical Chemistry
Volume: 93
Issue: (8)
Page numbers: 919-934.
DOI: 10.1080/03067319.2012.708744

Abstract: In this work, the application of molecularly imprinted polymer (MIP) as the recognition element of a chemiresistor sensor was introduced. Toluene-imprinted polymer and non-imprinted polymer (NIP) were synthesized and then mixed with carbon black powder in the presence of melted n-eicosane as the binder agent. The obtained composites were applied for the construction of chemiresistor sensors. The sensor, fabricated with toluene-imprinted polymer, showed a significant response towards toluene. Moreover, the response of the NIP-based (polymer synthesized without solvent) chemiresistor sensor was very small and negligible. The components of the MIP-based sensing composite were found to strongly influence the sensor sensitivity. Response surface experimental design methodology was applied to optimize the important parameters of the proposed sensor. Cross-sensitivity of the MIP-based chemiresistor sensor for different vapours was investigated and a satisfactory result was found for toluene vapour recognition. It was shown that the sensor response to toluene concentration in air was linear in the concentration range of 3.8 to 46.4 ppm. The detection limit and relative standard deviation (for five separate determinations) of the designed sensor were calculated equal to 0.8 ppm and 5.6%, respectively
Template and target information: toluene
Author keywords: Chemiresistor, toluene, nanoporous, imprinted polymer, composite


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