Lelyushok S. The micellar extraction of aliphatic amines, cationic surfactant and their chelates for analytical purposes

The thesis is devoted to the investigation of the regularities of phase formation in the micellar-extraction system of nonionic surfactant OP-7 at cloud point temperature. Also the interface distribution of basic substrates, cationic surfactants and their analytical forms was investigated. The influence of the concentration conditions and the form of substrate on the phase separation in the nonionic surfactant solutions at the presence of aliphatic amines was characterized. The differentiating influence of OP-7 micellar media on the protolytic properties of aliphatic amines depending on the carbon atom number in the hydrocarbon chain was detected and investigated. The specificity of the interphase distribution of aliphatic amines between the water and surfactant-rich phase in comparison with the liquid- liquid extraction was shown. The dominant influence of amine nature and the anticooperative effect of ligands' hydrophobicity on the distribution of Nickel-aminocarboxylate complexes were shown. The increase of the cloud point extraction efficiency at the hydrophobic correspondence between the substrate and the surfactant-rich phase for cationic surfactants, their associates with the anionic surfactants and Ag-azoreagent-cationic surfactant complexes was shown. The recommendations for the choice of reagents and conditions for the effective micellar extraction of metal ions in the form of aminocarboxylate complexes and three-component ionic associates were designed. On the basis of data obtained the procedures for determination of metals, cationic surfactants and pharmaceutical preparations were proposed.