| abstract |
The present invention relates to a method for identifying properties of substances, in particular liquid substances, wherein the method is based on subjecting a sample (5) of a substance containing on the one hand metal ions and on the other hand a thiol group or disulfide bonds first to the analysis in the original or untreated state, i.e. in the state not irradiated by UV radiation (2, 3, 4), and subsequently subjecting the sample to UV radiation (2, 3, 4), thereby causing spectral changes (10) which are characteristic for the given substance, and investigating the optical properties and possible differences between the original substance and the examined sample of substances based on the change in the spectral characteristics of the sample prior to its irradiation or information stored in the database about the non-radiated sample, and after its irradiation with UV radiation (2, 3, 4). Preferably, the UV radiation (2, 3, 4) in the sample (5) generates quantum nanocrystals (6), free radicals (7), degrades chemical bonds (8) or photo-bleaches (9). |