Abstract
Scales of human odour perception are subjective and there is much need for automated methods of odour measurement in a variety of industries. Organic conducting polymers have been developed as sensing devices, and many materials have been synthesised and characterised. The sensors show rapid adsorption and desorption characteristics and allow rapid measurements to be made. The responses are proportional to the concentration of the volatile chemical being sensed, and with calibration can be used to quantify single chemical species. Arrays of sensors produce patterns of responses that can be used as descriptors for discriminating complex odours. Examples of applications in food quality monitoring and agriculture malodours are given. The sensor array response may be correlated with olfactometric measurements in the case of pig slurry malodour.
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