Electronic nose applications

Varieties of polymers are also employed as sensitive material for electronic nose applications, and the operating temperature may reach about 100 ° C. In the case of quartz microbalance-based sensors a large role is played by the chemically interactive material (CIM) on which it is deposited. A rather efficient room temperature operating CIM is the metal-porphirin, by which it is possible to construct varieties of nostrils, just changing the type of coordinated metal. Interesting metals success-... 

In a number of different bioreactor cultivations with bacteria, yeasts, molds and mammalian cells, it was shown how the electronic nose can serve to visualize the course of the processes. The pattern recognition method that best manages to mirror the complex sensor array responses during extended cultivations is two- or three-dimensional PCA. Examples from such electronic nose applications are given below. 

For chemosensor electronic nose applications, it is useful to have sensors with varied responses. The 12 different luminescent polymers (9-12 are germole copolymers) examined [41] exhibit a different ratio of the photoluminescence quenching for picric acid, TNT, DNT, and nitrobenzene and a different response with the same analyte, as shown in Figure 8. 

Labreche S., Bazzo S., Cade S., and Chanie E., Shelf life determination by electronic nose Application to milk, Sens. Actuators B, 106(1), 199, 2005. 

Chapter 8 Electronic Nose Applications in Medical Diagnose.233... 

T. Takeo, P.K. Mahanta, Why C.T.C. tea is less fragrant Two and a Bud 30, 76-77 (1983) B.G. Kermani, S.S. Schiffman, H.T. Nagle, Performance of the Levenberg-Marquardt neural network training method in electronic nose applications. Sens. Actuators B Chem. 110, 13-22 (2005)... 

S. Labreche, S. Bazzo, S. Cade, E. Chame, Shelf life determinadon by electronic nose application to milk. Sens. Actuators B Chem. 106,199-206 (2005)... 

The fibre optic sensor array was also tested in a classic electronic nose application, showing the ability to discriminate between pure analytes and more complex odours, such as those of coffee beans [14]. 

Arshak K, Moore E, Lyons GM, Harris J, Clifford S (2004) A review of gas sensors employed in electronic nose applications. Sensor Rev 24(2) 181-198... 

Yoo Y, Chae M, Kang J, Kim T, Hwang K, Lee J (2012) Multifunctionalized cantilever systems for electronic nose applications. Anal Chem 84 8240-8245... 

The book can be categorized into three parts sample preparation and instrumentation techniques, application examples, and olfactometry. The final two chapters discuss MS-based electronic nose applications (Chapter 13) and the chemical structures of flavor and off-flavor chemicals in various types of foods (Chapter 14). 

For various reasons, reliable electronic-nose applications have been slower to develop. Chapter 13 discusses the benefits of MS as a potential e-nose sensor. This book also discusses the value of time-of-flight MS to the study of flavors and odors. Incorporating the human sense of smell with potent analytical systems is invaluable in problem solving. Just as sample preparation procedures and analytical instrumentation have continued to evolve and improve, so have olfactometry techniques. Chapters 11 and 12 cover various olfactometry techniques, including a new, easier-to-implement method called SNIP. 

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