00000nam 2200000za 4500 9.862470 CaOODSP 20241203113644 cr ||||||||||| 180927s1987 oncd||||o f000 0 eng d CaOODSP eng eng fre n-cn--- En36-508/75E-PDF Cheam, V. National interlaboratory quality control study no. 33 [electronic resource] : sulphate in coloured waters / V. Cheam and A.S.Y. Chau. Burlington, Ont. : Environment Canada, 1987. vii, 13 p. : charts. Report series ; no. 75 Digitized edition from print [produced by Environment and Climate Change Canada]. Issued by the Inland Waters/Lands Directorate, National Water Research Institute, Canada Centre for Inland Waters. Issued also in French under title: Étude nationale interlaboratoire n° 33 de contrôle de la qualité : les sulfates dans les eaux colorées. Includes bibliographical references. "This report describes an interlaboratory comparison study for the analysis of SO4 in organic contaminated coloured waters. Some 70 Canadian laboratories participated in the analysis of five unpreserved water samples. Because of the interference from coloured matter in the waters, some methodologies, in particular the methylthymol blue colorimetry, were identified as producing results that were biased high. Some other methodologies performed well, particularly ion chromatography"--Abstract. Includes abstract in French. gccst Water management Chau, A. S. Y. (Alfred Shun-Yuen), 1941- Canada. Environment Canada. National Water Research Institute (Canada) Canada. Inland Waters and Lands Directorate. Étude nationale interlaboratoire n° 33 de contrôle de la qualité (CaOODSP)9.862477 Report series (Canada. Inland Waters and Lands Directorate) no. 75 (CaOODSP)9.862431 PDF 814 KB https://publications.gc.ca/collections/collection_2018/eccc/En36-508-75-eng.pdf