Determination of PCBs in biological samples using on-line SFE-GC

Determination of Androstenone in Pig Fat Using Supercritical Fluid Extraction and Gas Chromatography-Mass Spectrometry

“…The degree of coextraction of bulk fat components is dependent on the parameters used for the extraction. Alumina has been shown to retain lipids in environmental samples (Johansen et al, 1992;Gere et al, 1993), and it was tested whether it could serve the same purpose here. (%) remaining fat in the thimble (%) dental tampon = 0.7 g/mL, 40 °C, 115 The sample, 0.3 g of sow fat spiked (1 /¿g/g) with androstenone, was loaded on two different materials in the thimbles, dental tampons and alumina.…”

Determination of PCBs in Fish Tissues Using Supercritical Fluid Extraction

“…However, lyophilization of the tissues prior to extraction conserves considerable vessel volume by eliminating the need for inclusion of drying agents, such as sodium sulfate or diatomaceous earth. These reagents have been used by a number of researchers to immobilize moisture in the samples and to obtain better extraction efficiencies (17,18,20). Water content of the fishes used in our experiments ranged from 75% to 85% of the fresh weight of the tissue.…”

Fast and Selective Analytical Procedures for Determination of Persistent Organic Pollutants in Food and Feed Using Recent Extraction Techniques

“…Alumina as fat retainer for chlorinated organic contaminants Integrated fat removal from biological matrices using a fat adsorbing material inside the extraction cell was early investigated by Johansen et al for the determination of PCBs in fish, crab, human milk and blood (22)(23)(24). These studies exploited basic alumina enabling on-line coupling of the SFE instrument to gas chromatography (GC).…”