title: Utilization of fat retainers in supercritical fluid extraction for the selective extraction of polychlorinated biphenyls from a model fat sample.
abstract: Two common fat retainers used in supercritical fluid extraction--basic alumina and the silica based adsorbent Florisil--were investigated using lard fat as model material. With a fat retainer in the extraction cell it was possible to obtain fat-free time windows. Activation by heating did not influence the length of the time windows, while deactivation of the retainers with 10% water (w/w) drastically decreased the fat retaining capabilities. The influence of modifier addition was also investigated. Finally, a method was developed, where basic alumina was utilized to selectively extract polychlorinated biphenyls (PCBs) from a model fat sample, containing PCBs, triglycerides and phospholipids. The PCBs could be quantitatively extracted in a totally fat-free time window.
authors.affiliation: Department of Analytical Chemistry, Lund University, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Järemo
authors.forename: E
authors.initials: E
authors.lastname: Björklund
authors.forename: N
authors.initials: N
authors.lastname: Nilsson
authors.forename: L
authors.initials: L
authors.lastname: Karlsson
authors.forename: L
authors.initials: L
authors.lastname: Mathiasson
mesh_terms: D002845:Chromatography / Q000379:methods*; D005223:Fats / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification*
chemical_list: D005223:Fats; D011078:Polychlorinated Biphenyls