| abstract |
FIELD: chemistry. n SUBSTANCE: inorganic additive for labelling substances which is labelled with stable heavy isotopes is filler material and/or a pigment. The label is firmly embedded into the additive and one or more isotopes are selected from a group comprising 2 H, 13 C, 15 N, 18 O and/or 34 S. In order to obtain the inorganic additive, the label is embedded into the chemical compound of the additive via chemical treatment. n EFFECT: invention enables to identify labelled products. n 17 cl, 3 ex |