00000nam 2200000zi 4500 9.873194 CaOODSP 20241203113648 m o d f cr ||||||||||| 190517e198804##onc #o f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/88-112E-PDF Stokker, Yvonne D., author. Summary FICP report : interlaboratory study on the analysis of chlorophenols in natural waters / by Yvonne D. Stokker and A.S.Y. Chau. Interlaboratory study on the analysis of chlorophenols in natural waters Burlington, Ontario, Canada : National Water Research Institute, Research and Applications Branch, Quality Assurance Group, April 1988. 1 online resource (ii, 14 pages). text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 88-112 Title from cover. Digitized edition from print [produced by Environment and Climate Change Canada]. "An interlaboratory study for the analysis of chlorophenols in natural waters was conducted for the Federal Interdepartmental Committee on Pesticides (FICP) Check Sample Program. Participants were requested to analyze for phenol and eight chlorinated phenols in five test samples. The results of the study indicated that most laboratories have the capability of performing sensitive and isomer-specific analysis for chlorophenols in water. Comparable satisfactory results were generated for pentachlorophenol and higher chlorinated phenols. In the analysis of phenol and the two monochlorophenols, however, the data for the "standard" solutions were considerably better than those for the water samples. Thus, it was believed that the extraction procedures and not the derivatization and analysis were most likely to be the major sources of error for these compounds in this study. The intralaboratory precision (or in-house reproducibility) for the majority of participating laboratories was very good. However, the interlaboratory precision (or between-lab repeatability) for the same compound was extremely poor. This would suggest that there could be a need for more accurate analytical standard solutions as well as external reference solutions to which they can be compared in order to monitor their accuracy over time. Lastly, this study also indicated that at least one laboratory could benefit from more stringent in-house quality control"--Abstract, page ii. Includes abstract and management perspective in English and French. gccst Pesticides gccst Water quality gccst Analysis Chau, A. S. Y. (Alfred Shun-Yuen), 1941- author. Canada. Environment Canada. National Water Research Institute (Canada). Research and Applications Branch. NWRI contribution ; 88-112. (CaOODSP)9.844121 PDF 1.10 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-88-112-eng.pdf