The work is devoted to the evaluation of the selective properties of a number of poly(N-thiocarbamoyl-3-aminopropyl silsesquioxanes) in relation to the precious metal ions. It has been established that under conditions of competitive 130 sorption, the studied substances are mainly extracted Pt (IV), Au (III), Pd (II) and Ag (I); the conditions under which separation of Au (III) from platinum ions is possible have been selected. The value of the total dynamic capacity of TKAPPSS-1.39 according to Ag (I) in the dynamic mode was determined: 0.305 mmol/g, while the sorption of base metal ions is insignificant. The use of thiourea sulfuric acid solution for de-sorption of Ag (I) from the TKPPSS surface allowed to achieve the maximum value of the elution degree of 93% whis using TKAPPSS-2.56.