00000nam 2200000zi 4500 9.878917 CaOODSP 20241203113652 m o d f cr bn||||||||| 190904t19731973onc ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- En36-508/26E-PDF En36-508/26 Wales, R. W., author. Interlaboratory quality control study no. 5 : chromium, iron, molybdenum and vanadium / R.W. Wales and D.J. McGirr. Burlington, Ontario : Inland Waters Directorate, Canada Centre for Inland Waters, 1973. ©1973 1 online resource (v, 6 pages). text txt rdacontent computer c rdamedia online resource cr rdacarrier Report series ; no. 26 Page iv blank and unnumbered in original print edition and omitted in this copy. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 5). "Samples containing known amounts of chromium, iron, molybdenum and vanadium were distributed to thirteen laboratories to be analyzed by the laboratories' usual methods. The majority of laboratories determined the metals by atomic absorption; in addition, iron was determined colorimetrically for comparison. Only a few participants were able to analyze all four metals, and in the case of molybdenum and vanadium the small number of results received made it difficult to come to firm conclusions about the reliability of the method. The precision for chromium was better than in a previous study. The results obtained for iron by atomic absorption with solvent extraction were good, while the colorimetric method was intermediate in precision and sensitivity between solvent extraction and direct aspiration using atomic absorption"--Summary, page v. Issued also in print format. gccst Water gccst Water quality gccst Analysis McGirr, D. J., author. Canada. Environment Canada. Canada. Inland Waters Directorate. Report series (Canada. Inland Waters Directorate) no. 26. (CaOODSP)9.862410 PDF 475 KB https://publications.gc.ca/collections/collection_2019/eccc/en36-508/En36-508-26-eng.pdf