Micellar Electrokinetic Chromatographic Separation/Determination of Uranium, Iron, Copper and Nickel from Environmental Ore Samples Using Bis(salicylaldehyde)meso-stilbenediimine as Chelating Reagent

Abstract

Uranium is well known for its use as nuclear fuel and is increasingly being used for power generation. The sensitive methods for determination of uranium are based on inductively coupled plasma mass spectrometry (ICP-MS) 1,2 , inductively coupled plasma atomic emission spectrometry (ICP-AES) 3 , X-ray fluorescence spectrometry 4 , activation analysis 5 , high performance liquid chromatography (HPLC) 6 and capillary electrophoresis (CE) [7][8][9] . High sensitivity and selectivity for the determination of uranium is reported using HPLC with appropriate complexing reagents. For post-column derivatization complexing reagents commonly used are arsenazo III and 4-(2-pyridyl) resorcinol [10][11][12][13][14] . For pre-column derivatization, different hydrazones 15,16 , α-hydroxyisobutyric acid 17 and tetradentate Schiff bases [18][19][20][21] have been reported.The analytical procedures based on ICP-MS and ICP-AES are sensitive for multi-elemental analysis, but involve expensive equipment with high running cost.Capillary electrophoresis (CE) is taking place for the analysis of metal ions due to its high resolution power, low solvent consumption and short analysis time [22][23][24][25][26][27][28] . Capillary electrophoresis separations are based on different modes

Ionic Liquid–Liquid Chromatography: A New General Purpose Separation Methodology

“…Nickel(II) and cobalt(II) chloride have been separated by a five-stage continuous process using the ionic liquid [P 6 6 6 14 ]Cl [ 177 ]. The chromatographic separation of these metal(II) salts has been carried out using a number of techniques, including anion-exchange chromatography [ 178 ], adsorption thin layer chromatography (TLC) of metal(II) chelates [ 179 ], TLC [ 180 ], HPLC of diaminostilbene complexes [ 181 ], chromatographic separation of amino acid chelates [ 182 ], micellar electrokinetic chromatography [ 183 ], a guar-based chelating ion exchange resin chromatography [ 184 ], and a dibenzyl sulfoxide solution supported on silica as a stationary phase [ 185 ].…”

Simultaneous determination of rare earth elements in ore and anti-corrosion coating samples using a portable capillary electrophoresis instrument with contactless conductivity detection

“…Indeed, the simplest format of the technique, namely capillary zone electrophoresis (CZE) has been reported for the determination of REEs in different matrices, using UV-vis (UV-vis) detection [16][17][18][19][20][21][22][23], laser induced fluorescence (LIF) detection [24,25], mass-spectrometric detection [26] or detection by ICP-MS [27,28]. Other modes of CE have also been used for this purpose, notably micellar electrokinetic chromatography (MEKC) [29][30][31], electrokinetic supercharging (ESK) [32] and isotachophoresis (ITP) [33]. Complexation with suitable UV/Vis or fluorescence absorbing ligands was needed to enable optical detection of the REEs.…”

Estimation of methylglyoxal in cow milk – an accurate electrochemical response time based approach

“…The conventional methods used for the detection of MG are high performance liquid chromatography (HPLC), gas chromatography, 7 GC-MS, 8 ion pair chromatography, MEKC, 9 capillary electrophoresis and enzyme-linked immunosorbent assay (ELISA), which are time consuming and expensive. [10][11][12][13] Electrochemical biosensors, which are simple, highly selective, low-cost, rapid and portable, have been proposed for methylglyoxal detection.…”