3.1. Equipment and method
A schematic diagram of the CC-SFE system employed in
this study is shown in Fig. 5. The CC-SFE pilot plant has the
following features: a CC extraction column with three levels of
sample introduction (top, middle, and bottom as shownin Fig. 5);
two separator cells (270mL capacity each), where a cascade
decompression takes place; and a cryogenic trap at atmospheric