Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Sorption of hydrophobic organic compounds on nonpolar SPME fibers and dissolved humic organic matter—Part III: Application of the solubility parameter concept to interpret sorption on solid phase microextraction (SPME) fiber coatings
Autor Poerschmann, J.;
Journal / Serie Journal of Microcolumn Separations
Erscheinungsjahr 2000
Department TUCHEM; SAN;
Band/Volume 12
Heft 12
Sprache englisch;
Keywords solid phase microextraction; Hildebrand solubility parameters; partitioning processes; octanol–water coefficients
Abstract Hydrophobic organic compounds (HOCs) sorption on nonpolar poly(dimethylsiloxane) (PDMS) and polar polyacrylate (PA) fiber coatings is based on partitioning. By applying solubility parameter concept, explaining HOCs' sorption on amorphous polymers including “liquid” SPME coatings, Hildebrand solubility parameters (δ) of these fiber coatings can be calculated using fiber distribution coefficients (Kf). Hildebrand solubility parameters turned out to be decisive parameters for describing sorption on both coatings under study. Calculated solubility parameters of PDMS and PA coatings are within a very narrow range δPDMS=15.0±1.0 (J0.5 cm−1.5) and δPA=22.2±1.0 (J0.5 cm−1.5) when PAH and PCB fiber distribution coefficients are used to calculate data. Solubility parameter of the 7 μm PDMS coating is slightly, but significantly higher than the 100 μm coating. Once calculated, coating solubility parameter may serve to calculate Kf values of hydrophobic analytes based on available physicochemical data including octanol–water coefficients (KOW) and molar volumes (Vm). Sorption coefficients on nonpolar PDMS and polar PA fiber coatings, available in the literature, fit well in this universal one-parameter solubility concept. Fiber distribution coefficients and corresponding octanol–water coefficients follow a strong correlation for analytes of the same “family.” For analytes possessing δi≅21.5 J0.5 cm−1.5, relation Log Kf, PA=Log KOW is valid
ID 7528
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=7528
Poerschmann, J. (2000):
Sorption of hydrophobic organic compounds on nonpolar SPME fibers and dissolved humic organic matter—Part III: Application of the solubility parameter concept to interpret sorption on solid phase microextraction (SPME) fiber coatings
J. Microcolumn Sep. 12 (12), 603 - 612