Abstract
Abstract A new liquid membrane method is proposed for selective extraction and preconcentration of aromatic amines from their diluted aqueous solutions. The Liquid Pertraction Technique applied for preconcentration of pyridine and m-toluidine provides high extraction efficiency and stable continuous operation. It was shown that the main factors affecting the mass transfer efficiency and hence the enrichment factor and preconcentration accuracy are the mean residence time of the donor (sample) solution in the apparatus and the motion intensity of the membrane liquid.
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