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COLORIMETRIC DETERMINATION OF PD(II), RH(III), RU(IV) ON THE SURFACE OF SILICA GEL CHEMICALLY MODIFIED WITH THIOUREA GROUPS: UDC 543.4:54.412.2.544.723–546.9. Вісник: Хімія. 2014;50(1):41-43. Accessed February 14, 2026. https://chemistry.bulletin.knu.ua/article/view/8500