Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1016/j.microc.2023.109452
Ключевые слова: Chemically modified silica, 2-aminophenyl disulfide, Bis[3-(triethoxysilyl)propyl] tetrasulfide, adsorption, palladium, icp-oes, test-method
Аннотация: Adsorbents based on silica gel chemically modified with arch structure 2-aminophenyl disulfide (DSS) and bis[3-(triethoxysilyl)propyl]tetrasulfide (TSS) groups have been synthesized. The proposed adsorbents quantitatively extracted (extraction ∼99 %) only palladium(II) among all platinum metals from solutions of 2 M HCl - pH 4. QuaПоказать полностьюntitative extraction of Pd(II) was not interfered with 106-fold excesses of alkaline, alkaline-earth, 104-fold excesses of non-ferrous metals and iron, 102-103-fold excesses of other platinum metals. Pd(II) was eluted quantitatively (desorption ∼99 %) from the adsorbents surface with 5–10 % thiourea solutions and could be determined in the eluate by inductively coupled plasma optical emission spectrometry (ICP-OES). The adsorption capacity of DSS and TSS adsorbents was not changed after 5 adsorption-elution cycles. The limit of detection of palladium in the analyzed solution, calculated using the 3 s-criterion, was 0.1 μg/L for solid-phase extraction-inductively coupled plasma optical emission spectrometry (SPE-ICP-OES) method with a preconcentration factor of 50. Intensive yellow-orange color of the palladium surface complex was used in the development of express test-methods for its determination. SPE-ICP-OES and test methods were used in the determination of palladium in certified reference materials of sulfide copper-nickel ore and products of its technological processing.
Журнал: Microchemical Journal
Выпуск журнала: Т.195
Номера страниц: 109452
ISSN журнала: 0026265X
Издатель: Elsevier Science Publishing Company, Inc.