Sample pre-treatment and enrichment using the supported liquid membrane (SLM) technique for the determination of phenolic nitrile herbicides in presence of carbamates in river water samples was investigated. The uncharged herbicide molecules from the flowing aqueous solution diffuse through an immobilized water-immiscible organic solvent, supported by a porous polytetrafluoroethylene (PTFE) mem...

A metal (Ag, Au, Pd, Sn, Bi, In, Co, Al) layer directly deposited onto a liquid-crystalline lipid membrane resulted in different morphologies, ranging from a monolayer of discrete particles to a continuous film, depending on the metal's oxidation tendency.

Aromatic aldehydes are efficiently condensed with 2'-hydroxyacetophenone by polymer-supported basic ionic liquid as an excellent heterogeneous catalyst utilizing the Claisen–Schmidt reaction. Microwave irradiation has been employed, providing flavanone in good yield and short reaction time.

CaCO3 can crystallize as calcite, aragonite and vaterite. Calcite and aragonite are the most common biologically formed CaCO3 polymorphs, and vaterite is transformed into calcite via a solvent mediated process. Calcium carbonate makes an attractive model mineral for studies, since the morphology of CaCO3 has been the subject to control in biomineralization processes. And control of vaterite als...

This paper deals with the resolution of racemic -cyclohexyl-mandelic acid containing copper(II) N-dodecyl-(L)-hydroxyproline (CuN2) as a chiral carrier across hollow fiber supported liquid membrane. A mathematical model of transport and resolution of chiral compounds was deduced, the observed partition coefficient between the feed phase and the membrane phase, the stripping phase and the membra...

a comprehensive study pertaining to the emulsion liquid membrane (elm) extraction process to enrich dilute aqueous solutions of silver salt is presented. the study has highlighted the importance and influence of membrane composition for maximizing the extraction of ag+ ions. the liquid membrane was made up of cyanex-302 as an extractant and the industrial solvent mainly consists of paraffinic a...

Transport behaviour of Lu(III) across a polypropylene hollow fibre-supported liquid membrane containing di(2-ethylhexyl)phosphoric acid (DEHPA) in dihexyl ether as a carrier has been studied. The donor phase was LuCl(3) in the buffer solution consisting of 0.2 M sodium acetate at pH 2.5-5.0. A miniaturised system with a single hollow fibre has been operated in a batch mode. The concentration of...

Este artigo trata da separação enantiomérica do ácido α-cicloexilmandélico contendo cobre(II) N-dodecil-(L)-hidroxiprolina (CuN 2 ) como um carregador quiral, usando uma membrana líquida suportada em fibra oca. Um modelo matemático de transporte e separação enantiomérica de compostos quirais foi deduzido; o coeficiente de partição observado entre a fase de alimentação e a membrana, a fase de el...