Synthesis of silica gel immobilized thiourea and its application to the on-line preconcentration and separation of silver, gold and palladium

Separation of Gold, Palladium and Platinum from Metallurgical Samples Using an Amberlite XAD-7 Resin Column Prior to Their Atomic Absorption Spectrometric Determinations

“…In general, the analyte from a relatively large volume of solution is selectively retained by a solid-phase material based on a variety of mechanisms, and then released into a relatively small volume of eluent. In solid-phase extraction procedures based on adsorption, complexes, chelates and ion associates, the analytes are retained on columns filled with XAD resins, 12,13 polyurethane foams, 14 activated carbon 15-17 and silica gel 18,19 etc. Amberlite XAD series in most studies in our working group have been successfully used.…”

Applications of Amberlite XAD based Chelating resins in Online Pre concentration of metal ions

“…The chelating resins can be used in flow injection system with various detection methods like FAAS, ICP-AES, spectrophotometry, chemiluminescence and ICP-MS etc [26].There are various chelating resins have recently been used such as polyurethane foam [27][28][29][30][31][32][33][34][35], cellulose, silica gel [36][37][38][39][40][41][42], alumina [43][44][45][46][47][48], chitosan [49][50][51], carbon active [52] and polymeric resins like Amberlite etc. Amberlite XAD resins widely used to develop several chelating materials for preconcentration procedures due to its good physical and chemical properties such as porosity, high surface area, durability and purity.…”

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

“…Moreover, the recent surge in commodity prices has generated a new interest in the mining of e-wastes . This urban mine holds immense amounts of these metals (by comparison, Au and Pd are present in extremely low concentrations in rocks (~4 ng/g), soils (1 ng/g), seawater (0.05 µg/L), and river water (0.2 µg/L) [14][15][16] ). To ensure a continuing and reliable supply of palladium, gold and cobalt metals for future technological innovations and new electronic equipment, it is important to develop an efficient and low-cost technology for recycling precious metals from e-waste.…”

“…Several powerful and well-established methodologies and analytical techniques have been used to discriminate and quantify Au(III), Pd(II), and Co(II) in natural ore and industrial waste, including flame and carbon furnace atomic absorption spectrophotometry, ultraviolet-visible (UVvis) spectrophotometry, neutron activation analysis, and inductively coupled plasma mass spectrometry [14][15][16][21][22][23][24][25][26][27] . Despite their versatility and growing popularity, these analytical techniques suffer from many shortcomings.…”