Solid-phase trapping of polychlorinated biphenyls in supercritical fluid extraction

Hanford/Rocky Flats collaboration on development of supercritical carbon dioxide extraction to treat mixed waste

“…At pressures where the system is two phase the solubility of the dichlorobenzene in the C0,-rich phase ranges from about 0.001 mol fraction at lower temperatures to 0.03 mol fraction at higher temperatures. Bowadt et al 1993 [l] 40°C 2000-3000 psi trapping efficiencies Trapping of solutes from saturated (presumably) solutions of various chlorobenzenes and No solubilities, just collection efficiencies. polychlorinated biphenyls in CO,.…”

Study of polychlorinated biphenyls in street dust by supercritical fluid extraction-gas chromatography/mass spectrometry

“…In recent years, supercritical fluid extraction (SFE) has been developed to extract non-polar organics, including PCBs, with specifically high yields from environmental samples [12,13,[15][16][17][18]. Supercritical fluids have the solvent power of liquids but have better mass transfer characteristics than liquid solvents, and therefore SFE turned out to be a potential alternative to liquid solvent extractions (e.g.…”

Collection Capacity of a Solid Phase Trap in Supercritical Fluid Extraction for the Extraction of Lipids From a Model Fat Sample

“…Two main principles dominate the collection procedures; either collection in a solvent 1 normally using a test tube of appropriate size, or onto a solid phase trap followed by an elution step. 2 Occasionally, a combination of these two principles has been used as described by Kleiböhmer et al, 3 where the extracted analytes passed a small adsorbent column before being collected in a solvent. A similar approach was used by Eckard and Taylor 4 in their investigation of the trapping capacity of different solid phases.…”