The Electronic Nose:

1. The Electronic Nose: A Multivariate Approach

2. The tasks of this report: • To inform on chemometrics studies in Voronezh • To describe the results of one research project

3. Igor V. Aristov Department of Analytical Chemistry Voronezh State University Tatyana A. Kuchmenko Department of Analytical Chemistry Voronezh State Technological Academy Authors:

4. Scientific interests • Analytical Chemistry • Electrochemistry • Separation methods • Applied Statistics

5. The Problem We want to distinguish vapors of chemical substances in air using a cross-selectivity multisensor detector

6. The “Electronic Nose” Unit for gas analysis with many cross-selectivity sensors.

7. Input GAS The “Electronic Nose”: a scheme

8. Experimental equipment

9. Scheme of Analytical Information

10. Sorbates Benzol Aniline o-Methyl Aniline m-Methyl Aniline p-Methyl Aniline Analytical signals DF; frequency difference a; capacity t0.5; time of half sorption Electronic Nose with 14 cross-selectivity sensors

11. Aniline Benzol п- Methyl Aniline м- Methyl Aniline о-Methyl Aniline Vapor Print TM

12. Aniline Benzol м- Methyl Aniline п- Methyl Aniline о-Methyl Aniline Vapor Print TM

13. Discriminant Analysis

14. Discriminant Analysis

15. Classification

16. Scheffe test (t0.5)

17. Scheffe test (DF)

18. Scheffe test (a)

19. In The Nearest Future • Optimization of sensors number • Multivariate calibration

20. The End