Utilization of fat retainers in supercritical fluid extraction for the selective extraction of polychlorinated biphenyls from a model fat sample.
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.
Järemo
M
M
Department of Analytical Chemistry, Lund University, Sweden.
Björklund
E
E
Nilsson
N
N
Karlsson
L
L
Mathiasson
L
L
D002845:Chromatography / Q000379:methods*; D005223:Fats / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification*
D005223:Fats; D011078:Polychlorinated Biphenyls