00000nam 2200000za 4500 9.849854 CaOODSP 20241203113641 cr ||||||||||| 180111s1986 onca|||fob|||f000 0 eng d CaOODSP eng n-cn--- En13-5/86-162E-PDF Cheam, V. Sulfate in coloured waters II [electronic resource] : evaluation of approaches for correcting historical colorimetric data / by V. Cheam and A.S.Y. Chau. Sulfate in colored waters II : evaluation of approaches for correcting historical colorimetric data Burlington, Ont. : Analytical Methods Division, National Water Research Institute, Canada Centre for Inland Waters, 1986. 13, [12] p. : ill. NWRI contribution ; 86-162 "February 1986". "Control No. AM302". "This manuscript has been submitted for publication in a Journal and the contents are subject to change". Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references: p. 12-13. "The various approaches for correcting historical colorimetric sulfate data were discussed and evaluated. A simple and direct approach was found to be satisfactory. To correct historical colorimetric data, data sets are first categorized and grouped together based on geographical locations and seasonal variations of DOC (or colour) of a specific site, river, lake (or groups) which have similar amounts and nature of organic matter. For each group, the colorimetric and chromatogrpahic S04 values are then obtained andrelated by an equation, which is used to convert the correspondinghistorical values to "true" SO4 values"--Abstract. gccst Acid rain gccst Scientific research gccst Water management Chau, A. S. Y. (Alfred Shun-Yuen), 1941- Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 86-162 (CaOODSP)9.844121 PDF 1.35 MB https://publications.gc.ca/collections/collection_2018/eccc/En13-5-86-162-eng.pdf