Electronic Nose Measurements

The flavor of food products is undoubtedly one of the most important parameters influencing acceptance of particular products by consumers. Therefore, evaluation of taste and smell of food products is important in different areas of food industry. Electronic nose (e-nose) is a sensor array device that can give useful information on the quality of food in combination with pattern recognition systems. Their basic principle is inspired by the neurophysiology of the senses of smell. Subsequently, much time and effort are spent on methods that can rapidly and automatically estimate and measure these factors: e-noses offer an additional method. Analysis of multivariate data is also an essential part of these systems. This chapter examines the advances on e-noses and their special applications to monitor food quality. The chapter first discusses the working principles of each system and gives a brief description of instrumentation. Further discussion concerns chemical sensor technologies and data processing methods. The chapter also includes examples of specific applications for the detection of food flavor and volatile components.

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