00000nam 2200000za 4500 9.841278 CaOODSP 20221107152040 cr ||||||||||| 170809s1967 onc ob f000 0 eng d CaOODSP eng eng fre n-cn--- M34-20/93E-PDF M34-20/93 Donaldson, Elsie M. Determination of cobalt and zinc in nickel metal by atomic-absorption spectrophotometry after separation by simultaneous chloroform extraction of their thiocyanate-diantiprylmethane complexes [electronic resource] / Elsie M. Donaldson and Vera H.E. Rolko, Mineral Sciences Division. Ottawa : Queen's Printer, 1967. iv, 14 p. Technical bulletin ; TB 93 Cover title. "August 1967." Includes errata. Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references. “An atomic-absorption spectrophotometric method for determining cobalt and zinc in the range 0.0005 to 0.10% in nickel metal is described. After sample dissolution, cobalt and zinc are separated from the matrix element by simultaneous chloroform extraction of their thiocyanate-diantipyrylmethane ion-association complexes from a citric acid medium at pH 3.25. Interference from copper and various elements (i.e. titanium, vanadium, molybdenum, tungsten, etc.) is eliminated with thiourea and ammonium fluoride, respectively. Cadmium, iron and chromium also interfere under the chosen experimental conditions, but the amounts of these impurities present in nickel metal are so low that their interference effects are negligible. Other impurities do not interfere in the proposed method"--Abstract, p. i. Includes abstract in French. gccst Metals Rolko, Vera H. E. Canada. Natural Resources Canada. Canada. Mines Branch. Technical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch) TB 93 (CaOODSP)9.834857 PDF 1.90 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-93-eng.pdf 299979