FIELD: labeled natural substances.
SUBSTANCE: invention provides a method for labeling humin and humin-like substances with tritium-containing agent, said agent being atomic tritium obtained via thermal catalytic dissociation of tritium on tungsten wire at pressure 0.3-0.6 Pa. Humin and humin-like substances are preliminarily deposited on reaction vessel walls utilizing lyophilization for aqueous solutions thereof. Thermal dissociation is effected by 5-10-sec pulses at tungsten wire temperature 1900-2000 K.
EFFECT: enabled uniform introduction of tritium and achieved radiation activity of preparation 69 to 254 GBc/g.
1 dwg, 2 tbl, 15 ex
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