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. 16. Cognis Group . MCT Redbook: Solvent Extraction Reagents and Applications , 2007 . 17. Forsberg , P. S. H. ; Priest , C. ; Brinkmann , M. ; Sedev , R. ; Ralston

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(LOQ) was estimated as 100 or 300 μg/kg [ 13 ]. The aim of this study was to lower the limit of quantification and to reduce the analysis time by employing acidified homogenization, centrifugation, solvent extraction, and derivatization

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determination by GC–MS. In this study, we have introduced a new simultaneous solvent extraction and cleaning procedure (excluding organic solvents like acetonitrile or methanol for BPA extraction, and hexane, or heptane for proteins and lipids removal) which is

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Abstract  

Catalytic phenomena in solvent extraction of metals with hydrophobic chelating extractants are reviewed. Interface modification by adsorption of additives, phase transfer catalysis, formation of micelles, reversed micelles and microemuslions are discussed and examples are given.

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Solvent extraction of hafnium(IV)

XXII. Extraction by N-benzoyl-N-phenyl hydroxylamine from water-dimethyl sulfoxide and water-dimethyl formamide solutions

Journal of Radioanalytical and Nuclear Chemistry
Authors: J. Příhoda and J. Hála

Abstract  

Solvent extraction of175,181Hf(IV) into solutions of HBPHA** in CHCl3, tetrachloro ethane (C2H2Cl4), CCl4 and benzene from mixtures of water with DMSO or DMFA at 2M HClO4 formal acidity was studied. With diluents containing acidic hydrogen (CHCl3, C2H2Cl4) the presence of DMSO or DMFA in the extraction system leads to an increased extractability of the Hf(IV) chelate. Possible reasons for this synergism are discussed. Extractions into benzene and CCl4, as well as those into CHCl3 and C2H2Cl4 at high DMSO and DMFA concentrations, are antagonistic. This is caused by the decrease of the partition coefficient of HBPHA, and changes in the solvation of Hf(IV) ion in the polar phase. The latter effect is very strong at high DMSO concentrations, and with macroconcentrations of Hf(IV) finally leads to precipitation of crystalline adducts Hf(ClO4)4·xDMSO (x=7–8).

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and fried dough twists as the research object, and automatic accelerated solvent extraction-gas chromatography-mass spectrometry (AASE-GC-MS) method was established for the determination of acrylamide in food. On the one hand, APLE is used to extract

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and fried dough twists as the research object, and automatic accelerated solvent extraction-gas chromatography-mass spectrometry (AASE-GC-MS) method was established for the determination of acrylamide in food. On the one hand, APLE is used to extract

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Abstract  

Five different incapacitating agents have been studied as ionic associates using solvent extraction. The water phase contained 0.1-0.01M HCl, the organic phase was chloroform. The distribution of appropriate ionic associates was established by means of dicarbollylcobaltate anion labeled with 60Co.

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Abstract  

We studied the solvent extraction behavior of astatine and found the anomalous behavior of this element similar to radioiodine. Astatine was extracted into CS2 from acidic solution over a wide range of carrier iodine concentration. The distribution ratios of astatine were determined by measuring the -ray from 210 At with a Nal(TI) detector. A drastic change was observed around at 10–4 mol/l as in the case of 131 I. This tendency is well explained by the kinematics of the chemical reactions concemed.

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Abstract  

A systematic study has been carried out on the extraction of SeI4, by various water-immiscible organic solvents. Extraction has been investigated as a function of H2SO4 and Kl concentrations. It has been found that Se(IV) extraction is appreciably increased by addition of iodide ion to sulfuric acid solutions. On the other hand, the presence of water-miscible alcohols and acetone was found to enhance Se(IV) extraction from H2SO4–Kl solutions. In the light of the results, an extraction mechanism is suggested.

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