Use of Mixed Solvent Systems to Eliminate Sorption of Strongly Hydrophobic Organic Chemicals on Container Walls.

Autor:	Muwamba, Augustine1, Nkedi-Kizza, Peter1 Kizza@ufl.edu, Rhue, Roy Dean1, Keaffaber, Jeffrey J.1
Předmět:	*Solvents *Adsorption (Chemistry) *Anthracene *DDT (Insecticide) *Dieldrin Organic compounds research Polytef Polycarbonates Polypropylene Data analysis
Zdroj:	Journal of Environmental Quality. May/Jun2009, Vol. 38 Issue 3, p1170-1176. 7p.
Abstrakt:	The article discusses the use of mixed solvent systems to measure sorption isotherms of strongly hydrophobic organic chemicals (SHOCs), thereby avoiding the overestimation of the normalized sorption coefficient that sometimes results from adsorption of SHOCs on container walls. The sorption coefficient and percent recovery of anthracene, dichlorodiphenyltrichloroethane (DDT), and dieldrin during sorption on centrifuge tubes made of polytetrafluoroethylene (PTFE), polycarbonate (PC), polypropylene copolymer (PPCO), and glass high pressure liquid chromatography vials were obtained in volume ratio-varied methanol-water mixtures. Data analysis finds that sorption on container walls is a source of error that may be one cause of the large variability in literature on SHOCs.
Databáze:	GreenFILE
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