Toxaphene levels in salmon (Salmo salar) from the Baltic Sea

Three toxaphene congeners have been determined in salmon from the Swedish c oastal environment using both supercritical fluid (SFE) and the traditional liquid/liquid extractions. The levels obtained using a modifier-free SFE t echnique, followed by group separation on a silica gel column, were by far much lower than concentrations obtained by SFE with a modifier or liquid/li quid extraction. The mean concentrations on fresh weight basis using a liqu id/liquid extraction technique were 5.87, 8.70 and 1.59 mu g/kg for CHBs 26 , 50 and 62, respectively. There was a plausible relationship between the v arious fishing sites and the toxaphene levels. (C) 2000 Elsevier Science Lt d. All rights reserved.