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Three fly ash extracts, of which two were fortified with different PCDFs and PCDFs congeners, were analysed by eight different laboratories. The results show relatively good precision, RSD for levels reported as TEQs are below 25%. Problems with the analysis of 1,2,3,7,8,9-HxCDF was observed.Multivariate data analysis was performed to explore the data and principal component analyses of the data...
Supercritical fluid extraction (SFE) of 36 PCBs from human adipose is presented. Selective extraction of the PCBs is achieved using supercritical CO 2 with a density of 0.9 g/ml (281 bar) at 40°C and with AlOx as a fat retainer. Compared to the traditional liquid extraction method followed by further sample clean up, SFE is not only faster (2 hours compared to three days) but also utilises...
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