Chemical sensors for electronic nose systems

Chemical sensors have been widely used for the analysis of volatile organic compounds. Employing chemical sensors in an array format with pattern recognition provides a higher degree of selectivity and reversibility leading to an extensive range of applications. When such systems are used for odour...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2005-02, Vol.149 (1-2), p.1-17
Main Authors: JAMES, David, SCOTT, Simon M, ALI, Zulfiqur, O'HARE, William T
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chemistry
Electrochemical methods
Exact sciences and technology
General, instrumentation
Global environmental pollution
Pollution
Spectrometric and optical methods
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Summary:Chemical sensors have been widely used for the analysis of volatile organic compounds. Employing chemical sensors in an array format with pattern recognition provides a higher degree of selectivity and reversibility leading to an extensive range of applications. When such systems are used for odour analysis they are termed 'electronic noses'. Application of electronic noses ranges from the food industry, medical industry to environmental monitoring and process control. Many types of different gas sensors have been employed in the array. These include conducting polymers, metal oxide semiconductors, piezoelectric, optical fluorescence and amperometric gas sensors The transducer principle of these sensors is varied and is discussed in detail within this review. Examples of the current trends in sensor array technology as well as the applications to which the sensor-based noses have been applied are also discussed.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-004-0291-6