00000nam 2200000zi 4500 9.870086 CaOODSP 20241203113646 m o d f cr ||||||||||| 190318e198706##onc #ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-on En13-5/87-123E-PDF Lee, H. B., author. Preservation of organics : part II : stability of chlorophenols in preserved natural water samples / by H.B. Lee, Y.D. Stokker, N. Arafat and A.S.Y. Chau. Stability of chlorophenols in preserved natural water samples Burlington, Ontario, Canada : National Water Research Institute, Research and Applications Branch, Canada Centre for Inland Waters, June 1987. 1 online resource (iv, 8 pages, 14 unnumbered pages). text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 87-123 Title from cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "This study monitored the stability of 20 chlorophenols (CP) including the monochlorophenols in spiked water samples from five regions. Before the full-scale study was implemented, a pilot study was designed to evaluate the efficiency of three chemicals, namely, chloroform, copper sulfate and sulfuric acid, for the preservation of CP in water. Using Lake Ontario water as a typical sample, results indicated that both copper sulfate and sulfuric acid were effective preservatives. However, sulfuric acid was later chosen in the full-scale study since it was also used to preserve water samples for trace metal and acid herbicide analyses. The stability of CP in the spiked and sulfuric acid-preserved water samples was monitored by repetitive analysis of the samples immediately after spiking, as well as after 3, 6, 10, and 15 weeks of storage at 4°C in the dark. Under such conditions, the results in the full-scale study indicated no evidence of degradation for any CP in all samples over the 15-week study period"--Abstract, page ii. Includes a management perspective and abstract in English and French. gccst Water management gccst Chemicals gccst Samples Stokker, Yvonne D., author. Arafat, Nabil, author. Chau, A. S. Y. (Alfred Shun-Yuen), 1941- author. Canada. Environment Canada. National Water Research Institute (Canada). Research and Applications Branch. Canada Centre for Inland Waters. NWRI contribution ; 87-123. (CaOODSP)9.844121 PDF 1.57 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-87-123-eng.pdf