Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Ion exchange membranes as novel passive sampling material for organic ions: Application for the determination of freely dissolved concentrations
Autor Oemisch, L.; Goss, K.-U.; Endo, S.;
Journal / Serie Journal of Chromatography A
Erscheinungsjahr 2014
Department AUC;
Band/Volume 1370
Sprache englisch;
POF III (gesamt) T42;
Keywords Ionic organic chemicals; Free concentration; Equilibrium dialysis; Ion exchange polymer; Serum albumin
UFZ Querschnittsthemen RU3;
Abstract Many studies in pharmacology, toxicology and environmental science require a method for determining the freely dissolved concentration of a target substance. A recently developed tool for this purpose is equilibrium passive sampling with polymeric materials. However, this method has rarely been applied to ionic organic substances, primarily due to limited availability of convenient sorption materials. This study introduces ion exchange membranes (IEMs) as a novel passive sampling material for organic ions. The partitioning of 4-ethylbenzene-1-sulfonate, 2,4-dichlorophenoxyacetic acid and pentachlorophenol to one anion exchange membrane (FAS) and of difenzoquat, nicotine and verapamil to one cation exchange membrane (FKS) was investigated. All test substances exhibited a sufficiently high affinity for the respective IEM with logarithmic IEM–water partition coefficients >2.3. Sorption equilibrium was established quickly, within several hours for the FAS membrane and within 1–3 days for the FKS membrane. For permanently charged substances the partitioning to the IEMs was independent of pH, but was influenced by the salt composition of the test solution. For all test substances sorption to IEM was dependent on the substance concentration. Bovine serum albumin–water partition coefficients determined by passive sampling with IEMs agree well with those determined by the conventional dialysis method. The results of this study indicate that IEMs exhibit the potential to measure freely dissolved concentrations of organic ions in a simple and time-saving manner.
ID 15460
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=15460
Oemisch, L., Goss, K.-U., Endo, S. (2014):
Ion exchange membranes as novel passive sampling material for organic ions: Application for the determination of freely dissolved concentrations
J. Chromatogr. A 1370 , 17 - 24