MASS-TRANSFER KINETICS FOR ANALYTICAL ENRICHMENT AND SAMPLE PREPARATION USING SUPPORTED LIQUID MEMBRANES IN A FLOW SYSTEM WITH STAGNANT ACCEPTOR LIQUID

Supported liquid membranes in a flow system have been utilized for sel ective sample enrichment, clean up and field sampling, prior to the ap plication of chromatographic and spectrometric analytical methods. For similar objectives, supported liquid membranes may be combined with a number of other analytical systems. The technique has a wide range of applications, especially in the fields of environmental analysis and bioanalysis. This paper presents the theoretical principles for the te chnique and the mass transfer kinetic equations relevant to most appli cations. Guidelines for the optimization of experimental conditions an d physical dimensions of the extraction devices are discussed.