ESR Study of the Complex Formation Between Cu(ClO₄)₂and a Functionalized Silica Gel Surface

Sorption of trace metals on human hair and application for cadmium and lead pre-concentration with flame atomic absorption determination

“…Figure 3 shows that the sorption capacity for Cd and Pb are 39 and 26 µmol g -1 , respectively. These sorption capacity values are similar to or higher than those obtained by grafting special ligands on some inorganic matrixes [26,27] and resins [28].…”

Study of Copper Complexes Absorbed on a Silica Gel Surface Chemically Modified with 5-Amino-1,3,4-thiadiazole-2-thiol

“…However, the magnitude of the calculated equilibria constants for Cu(ClO 4 ) 2 is nearly the same as that calculated for CuCl 2 and CuBr 2 . The surface complexes are thermodynamically stable and the calculated constants for (SiATT) m CuX 2 are very similar to those found for (SiL) m CuX 2 (L ϭ imidazole and benzimidazole) (13,23). Under saturation conditions, the ratio…”

Preparation, characterization, and CuX2 and CoX2 (X=Cl−, Br−, ClO−4) adsorption behavior of a polyhedral oligomer silsesquioxane functionalized with an organic base

“…For instance, the adsorption capacity for the determination of CuCl 2 from ethanol solution on SiPyCl [10] and benzimidazole-modified silica [18,27] is 0.34 and 0.22 mmol g −1 , respectively.…”

“…The adsorption capacity of ATPS for CuX 2 from ethanol solution is higher than that obtained with silsesquioxane 3-npropylpyridiniumchloride polymer (SiPyCl) [10], or silica gel surface chemically modified with benzimidazole [18,27], imidazole [20,21], or 3-amino-1,2,4-triazole [28]. For instance, the adsorption capacity for the determination of CuCl 2 from ethanol solution on SiPyCl [10] and benzimidazole-modified silica [18,27] is 0.34 and 0.22 mmol g −1 , respectively.…”