00000nam 2200000zi 4500 9.873739 CaOODSP 20241203113649 m o d f cr |n||||||||| 190528s1989 onc #ot f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-on En13-5/89-113E-PDF Maguire, R. J. (R. James) author. Potential underestimation of chlorinated hydrocarbon concentrations in fresh water / by R. James Maguire and Richard J. Tkacz. Burlington, Ontario : Rivers Research Branch, National Water Research Institute, 1989. 1 online resource (19 unnumbered pages). text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 89-113 Digitized edition from print [produced by Environment and Climate Change Canada]. "April 1989." Includes bibliographical references. "Significant concentrations of PCBs and other chlorinated hydrocarbons have been found in dichloromethane extracts of filtered Niagara River water at pH 12 after the water had been thoroughly extracted at pH 1. This finding was unexpected since all of those chemicals should have been extracted at low pH. Moreover considerable quantities of these chemicals were occasionally recovered in the basic extracts relative to acidic extracts and extracts of suspended solids. Experiments with water from another source showed that some PCBs were recovered in dichloromethane extracts of basic filtered water which had previously been extracted under either acidic or neutral conditions"--Management Perspective. Includes abstract in French. gccst Water pollution gccst Fresh water gccst Rivers Tkacz, Richard J., author. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 89-113. (CaOODSP)9.844121 PDF 1.44 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-89-113-eng.pdf