C ONTENTS P REFACE TO C HEMICAL S ENSORS : C OMPREHENSIVE S ENSOR T ECHNOLOGIES P REFACE TO V OLUME 6: C HEMICAL S ENSORS A PPLICATIONS A BOUT THE E DITOR C ONTRIBUTORS 1 C HEMICAL G AS M IXTURE A NALYSIS AND THE E LECTRONIC N OSE : C URRENT S TATUS , F UTURE T RENDS G. Korotcenkov J. R. Stetter 1 Introduction 2 Modern Methods of Gas Recognition 2.1 Gas Chromatography 2.2 Mass Spectrometry 2.3 GC-MS Method 2.4 Ion Mobility Spectrometry 2.5 Near-Infrared Spectroscopy 2.6 Other Methods of Gas Identification and Quantification 3 The Electronic Nose: Approaches and Achievements 3.1 A Brief History of the Electronic Nose 3.2 Definition of an Electronic Nose 3.3 The Electronic Nose: Principles of Operation for Detection of Odors 3.4 Sizes and Features of Sensor Arrays 4 Signal Processing in Electronic Noses 4.1 Pattern Recognition Software 4.2 Comparison of Chemical Sensor Array Pattern Recognition Algorithms 4.3 Short View of the Process of Software Design for Portable Devices 4.4 Electronic Nose Calibration 5 Electronic Nose Fabrication 5.1 Electronic Nose Configuration xi xv xvii xix 1 1 2 2 3 6 6 8 9 9 9 12 12 13 15 16 21 21 22 23 23 v