A sensor array based on mass and capacitance transducers for the detection of adulterated gasolines

The simultaneous use of different sensors technologies is an efficient method to increase the performance of chemical sensors systems. Among the available technologies, mass and capacitance transducers are particularly interesting because they can take advantage also from non-conductive sensing layers, such as most of the more interesting molecular recognition systems. In this paper, an array of quartz microbalance sensors is complemented by an array of capacitors obtained from a commercial biometrics fingerprints detector. The two sets of transducers, properly functionalized by sensitive molecular and polymeric films, are utilized for the estimation of adulteration in gasolines, and in particular to quantify the content of ethanol in gasolines, an application of importance for Brazilian market. Results indicate that the hybrid system outperforms the individual sensor arrays even if the quantification of ethanol in gasoline, due to the variability of gasolines formulation, is affected by a barely acceptable error.

[1]  Andrew P. Monkman,et al.  Polyaniline thin films for gas sensing , 1995 .

[2]  Pietro Siciliano,et al.  Comparison and integration of arrays of quartz resonators and metal-oxide semiconductor chemoresistors in the quality evaluation of olive oils , 2001 .

[3]  Udo Weimar,et al.  Soluble phthalocyanines for the detection of organic solvents: thin film structures with quartz microbalance and capacitance transducers , 1995 .

[4]  Heiko Ulmer,et al.  Sensor arrays with only one or several transducer principles? The advantage of hybrid modular systems , 2000 .

[5]  Arnaldo D'Amico,et al.  An array of capacitive sensors based on a commercial fingerprint detectors , 2008 .

[6]  Giuseppe Ferri,et al.  The application of metalloporphyrins as coating material for quartz microbalance-based chemical sensors , 1996 .

[7]  Gero Decher,et al.  Fuzzy Nanoassemblies: Toward Layered Polymeric Multicomposites , 1997 .

[8]  A. Riul,et al.  An artificial taste sensor based on conducting polymers. , 2003, Biosensors & bioelectronics.

[9]  Udo Weimar,et al.  Modular Sensor Systems for Gas Sensing and Odor Monitoring: The MOSES Concept , 1998 .

[10]  Ralph G. Pearson,et al.  HARD AND SOFT ACIDS AND BASES , 1963 .

[11]  Roberto Paolesse,et al.  Comparison and integration of different electronic noses for freshness evaluation of cod-fish fillets , 2001 .

[12]  C. Di Natale,et al.  A new application of capacitive sensors for the nucleic acids revelation , 2004 .

[13]  C. Di Natale,et al.  Pre-processing and pattern recognition methods for artificial olfaction systems: a review , 2005 .

[14]  Jonathan M. Slater,et al.  Multi-layer conducting polymer gas sensor arrays for olfactory sensing , 1993 .

[15]  S. Wold,et al.  PLS-regression: a basic tool of chemometrics , 2001 .

[16]  Ingemar Lundström,et al.  Investigation of quartz microbalance and ChemFET transduction of molecular recognition events in a metalloporphyrin film , 2009 .

[17]  Leonardo G. Paterno,et al.  Effect of pH on the preparation of self-assembled films of poly(o-ethoxyaniline) and sulfonated lignin , 2001 .

[18]  A. Epstein,et al.  Studies on the Chemical Syntheses and on the Characteristics of Polyaniline Derivatives , 1995 .

[19]  M. Haug,et al.  Controlled selectivity of polysiloxane coatings: Their use in capacitance sensors , 1992 .

[20]  R. Paolesse,et al.  Metalloporphyrins based artificial olfactory receptors , 2007 .

[21]  Raymond Nicholas French,et al.  Phase equilibria of ethanol fuel blends , 2005 .

[22]  J. Rubim,et al.  Determination of ethanol in fuel ethanol and beverages by Fourier transform (FT)-near infrared and FT-Raman spectrometries. , 2003 .