00000nam 2200000zi 4500 9.867715 CaOODSP 20241203113645 m o d f cr nn||||||||| 190129s1987 onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/86-219E-PDF Lee, H. B., author. Preservation of organics. Part I, Stability of organochlorinated insecticides in preserved natural water samples / by H.B. Lee, P.D. Leishman, S. Todd and A.S.Y. Chau. Burlington, Ontario : Analytical Methods Division, National Water Research Institute, Environment Canada, 1987. 1 online resource (11 pages, 28 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 86-219 Cover title. "Control no. AM357." "February 1987." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "This study monitored the stability of 19 common organochlorinated insecticides (OCs) in fortified water-samples from five regions. The study was implemented in two parts. A pilot study was designed to evaluate the efficacy of two potential preservatives, i.e. copper sulfate and chloroform, for OCs. Using Lake Ontario water as a typical sample, results in the pilot study indicated that chloroform was a more effective preservative than copper sulfate for OCs in water. In the full scale study, subsamples of the five regional waters were fortified, preserved with chloroform, and stored at 4‘C in the dark. The stability of OCs in the waters was monitored by analyzing the samples at 0-time, as well as after 3, 6, 10 and 15 weeks of storage. Results in the full scale study showed that, except for a few cases, the OCs in the preserved water samples were stable over the 15-week study period. The stability of endrin in these water samples was unknown because of erratic recoveries"--Abstract. Includes management perspective and abstract in French. Organochlorine compounds--Stability Insecticides Water--Pollution Leishman, Pat, author. Todd, S., author. Chau, A. S. Y. (Alfred Shun-Yuen), 1941- author. Canada. Environment Canada. National Water Research Institute (Canada). Analytical Methods Division. NWRI contribution ; 86-219. (CaOODSP)9.844121 PDF 1.85 MB https://publications.gc.ca/collections/collection_2019/eccc/En13-5-86-219-eng.pdf