Odourology is a science studies od odour formation spreading and indetification characteristics, finds physical nature of sense of smell, considering odour and smell as natural phenomenon. Odour is a volatile substance uninterruptedly producing bi biological organisms or exhalating by physical body. It has possibility to provoke sensation and such characteristics as stability, diffusion, dispersion, dynamics. All the odours producing by animals are individual because of inimitable geneticcode of molecule on which odour components based. Furthermore digestive products contain odour which provides metabolism process of cellular dissocation and withdrawing out of body with sweat.
Metabolites are odourological tracks or tracks od odour.
Odourological tracks, as distinct from odour, are forming as a result of interaction of the source of odour with other objects. But all of this detectors can identify homogeneus chemical substances and can't identify odoours of biological organisms. The analysis of human odour showed that butyric acid, one of components od sweat, has it's own individual odour in the meanwhile because chemical analysis of metabolite arouse the distraction of odour's bouquet . It's unexplained mysterious phenomenon. Attempts to restore it were in vain.