2,3-Dihydroxypyridine Loaded Amberlite XAD-2 (AXAD-2-DHP): Preparation, Sorption?Desorption Equilibria with Metal Ions, and Applications in Quantitative Metal Ion Enrichment from Water, Milk and Vitamin Samples

Determination of Some Trace Metals by FAAS after Solid-phase Extraction with Amberlite XAD-1180/TAN Chelating Resin

“…Comparisons of the sorption capacities of Amberlite XAD-1180/TAN with those of Amberlite XAD-1180, XAD-2, XAD-4 and XAD-7 supported resins show the superiority of the present resin for sorption of the trace metal ions over thiosalicylic acid, 30 chromotropic acid, 31 pyrocatechol violet, 32 pyrocatechol, 33 o-aminophenol, 20 tiron, 34 pyrogallol, 35 quinalizarin, 36 2-(methylthio) aniline, 37 2,3-dihydroxypyridine, 38 xylenol orange, 39 o-aminobenzoic acid, 19 and TAN (impregnated). 52 Better or comparable sorption capacities for the metal ions are shown by the present resin when compared with the other chelating resins.…”

“…The enrichment factors of the presented method for the investigated metal ions are beter 20,32,[34][35][36]39,52 than, or comparable 30,31,37,38,[40][41][42] to, the other chelating resins.…”

“…An alternative is to introduce a functional chelating group into the sorbent. For this purpose, three different means are available: (1) the synthesis of new sorbents containing functional groups (new sorbents); [23][24][25] (2) the chemical bonding of functional groups on existing sorbents (functionalized or immobilized sorbents); [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] and (3) the physical binding of the groups on the sorbent by impregnating the solid sorbent with a solution containing the chelating ligand (impregnated, coated or loaded sorbents). [43][44][45] Chelating resins produced by the immobilization of ligands (or functional groups) were succesfully used for solid-phase extraction, since they provide some advantages, like a high sorption capacity, high enrichment factor, and endurances towards to organic and inorganic solvents.…”

Novel Polymeric Resin for Solid Phase Extraction and Determination of Lead in Waters

“…Adsorbents such as ion-exchange resins, activated carbon, chelating resins, and others are generally used for SPE. However, most of them have no practical application due to the necessary long preconcentration time that typically ranges from 100 to 400 min [9,[25][26][27][28]. Particularly, the developing adsorbent resin without needing of any complexing reagent has the advantage of rapidity and simplicity in preconcentration step.…”

Octa-<i>O</i>-Methoxy Resorcin [4] Arene Amberlite XAD-4 Polymeric Chelating Resin for Solid Phase Extraction, Preconcentration, Separation and Trace Determination of Ni(II), Cu(II), Zn(II) and Cd(II) Ions

“…Amberlite XAD (styrene-divinyl benzene copolymer) resins, as the copolymer backbone for the immobilization of chelating ligands, have some physical superiority, such as porosity, uniform pore size distribution, high surface area, and chemical stability toward acids, bases, and oxidizing agents, as compared to other resins [62][63][64][65]. Either the adsorption of chelating ligands onto these supports or the covalent coupling of chelating moiety has been used to design polymeric chelating resins, which are versatile, durable, have good loading capacity towards metals, exhibit enhanced hydrophilicity and flexible working conditions.…”