00000nam 2200000zi 4500 9.874940 CaOODSP 20241203113650 m o d f cr |n||||||||| 190614s1990 oncd #ot f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/90-104E-PDF Serkerka, I., author. Analysis for dissolved oxygen in natural water, including sample preservation / by I. Sekerka and J.F. Lechner. Burlington, Ontario : National Water Research Institute, [1990] 1 online resource (17 unnumbered pages) : figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 90-104 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "A sample preservation procedure as part of the determination of dissolved oxygen (DO) in natural water by a modified Winkler method is described. The procedure involves the "in situ" treatment of the samples to the acid stage of the Winkler procedure. DO in preserved samples was stabilized for at least 70 days. Colorimetric and titrimetric methods for the quantitation of dissolved oxygen were evaluated and colorimetry was found to be a superior method"--Abstract. Includes abstract in French. gccst Water management Lechner, Josef F., author. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 90-104. (CaOODSP)9.844121 PDF 750 KB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-90-104-eng.pdf