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Separation, preconcentration, and spectrophotometry in inorganic analysis
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The article was published on 2000-01-01 and is currently open access. It has received 297 citations till now. The article focuses on the topics: Spectrophotometry.read more
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Liquid Ion Exchange Application for Micro Amount Separation and Determination of Ca(II) and Mg(II) as Anions Species with EDTA
TL;DR: In this article, the authors extracted Mg(II) and Ca(II), each one alone after combined with EDTA (H3Y-) as (MgHY-) and (CaHY-) after preparing ion pair complexes according to liquid ion exchange method by using Cinchonine (CK) after changing to liquidion exchanger HCK+;Cl- in HCl medium, spectrophotometric studies showed that the ion pair magnesium complex HCK+, MgHY- had a wave length for maximum absorbance of λmax=241 nm,
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Solvent extraction of Cu(II) from sulphuric acid by means of sodium diethyldithiocarbamate and characterization of the formed complex
S. Touati,A. H. Meniai +1 more
Abstract: The present work deals with the extraction of copper(II) from sulphuric acid solutions with sodium diethyldithiocarbamate (SDDT) as the extracting agent, testing six different organic solvents, namely dichloromethane, chloroform, carbon tetrachloride, toluene, xylene and cyclohexane, as diluents. The SDDT-chloroform pair showed to be the most selective in removing the copper cations, and hence was considered throughout the experimental study concerning the effects of operating parameters such as the initial concentration of the extracting agent, the agitation time, the agitation speed and the acid concentration. For an initial Cu(II) concentration of 63 mg/L in a 0.5 M sulphuric acid solution and an extracting agent mass of 20 mg, an extraction percentage around 97.8% and a distribution coefficient of 44.42 were obtained, confirming the good performance of the SDDT-chloroform pair. Different reliable analytical techniques such as thermogravimetric analysis, differential scanning calorimetry, ultraviolet-visible analysis, Fourier transform infrared spectroscopy and elementary analysis were used to demonstrate that the acidity did affect neither the complexing agent nor the formed complex. The obtained results compared reasonably well with reported values in the literature and hence supporting the adopted approach.
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Extraction-photometric determination of cadmium(II) using 1-(5-benzylthiazol-2-yl)azonaphthalen-2-ol
Andriy Tupys,Oleksandr Tymoshuk +1 more
TL;DR: In this paper, the absorption spectra of 1-(5-benzylthiazol-2-yl)azonaphthalen 2-ol were investigated in such solvents as ethanol, toluene, chloroform and carbon tetrachloride.
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Recovery of Uranium and Rare Earth Elements from Western Desert Phosphate Rocks with EDTA and Nitric Acid Solutions
TL;DR: In this paper, the effect of factors such as particle size, EDTA and nitric acid concentrations, agitation time, solid to liquid ratio, and dissolution temperature was studied, and the dissolution conditions were optimized.
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Double Purification Technique for Crude Yellowcake: Selective Dissolution of Impurities and Liquid-Liquid Extraction from Acetate Media
TL;DR: In this paper, a two-stage technique was developed for the uranium purification starting from Egyptian crude yellowcake, and the final purified uranium peroxide cake (66.2% U) of nuclear purity, meeting the ASTM C788-03 standard, was obtained from the stripping solution after hydrogen peroxide precipitation.