AQUEOUS SAMPLE DIRECT EXTRACTION AND ANALYSIS BY MEMBRANE EXTRACTION WITH A SORBENT INTERFACE

A mathematical model was developed for aqueous sample analysis by memb rane extraction with a sorbent interface (MESI). The model used in thi s paper includes the consideration of boundary layers which are locate d inside and outside of the membrane, In this study, benzene, toluene, ethylbenzene, trichloroethylene and hexane were the standard test ana lytes, Distribution constants of these analytes between the membrane a nd water mere measured, Some significant parameters were investigated, such as agitation, temperature and headspace effect, Good agreement w as found between the model and the experimental results.