00000nam 2200000zi 4500 9.874086 CaOODSP 20241203113649 m o d f cr ||||||||||| 190531s1990 oncd #ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-qu En13-5/90-34E-PDF Hanna, M. C. (Marian C.) author. Effect of sample preservation on body burden analysis of organic contaminants in unionid mussels / M. Hanna. Burlington, Ontario : Environment Canada, National Water Research Institute = Environnement Canada, Institut national de recherche sur les eaux, [1990] 1 online resource (18 pages) : graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 90-34 Title from cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "In order to quantitatively assess the effect of the temporary thawing out of the St. Lawrence mussel samples, collected between Lake St. Louis and Tadoussac, a comparative analysis was carried out on the unionid mussel Elliptio complanata, resampled by Ponar dredge from one site in the Cornwall/Massena area. To adequately reproduce the conditions of the thawing out problem, the mussels were divided into two groups, while Group A was kept in the freezer at -20°C, Group B was kept in the refrigerator for five days at 5°C. All the compounds present in the control were also present in Group B samples. Analysis of the organic contaminants in each of these two groups showed that for total PCB concentrations, the two treatments were not significantly different; however, when compared individually 6 of the 13 congeners showed significant differences. The observed differences were relatively small for individual PCB congeners (7.1 to 15.3%), higher for chlorobenzenes (10.5 to 36.4%), and yet higher for HCE (44.1%); the difference for HCE, although large is nevertheless not significant, even if only marginally so"--Abstract. Includes abstract and management perspective in English and French. gccst Molluscs gccst Pollutants gccst Analysis Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; 90-34. (CaOODSP)9.844121 PDF 1.67 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-90-34-eng.pdf