The determination of rare earths in Canadian ores. Part I, Chemical isolation and gravimetric determination of total rare earths / D. Barkley, Extraction Metallurgy Division. : M34-20/125E-PDF
“A procedure is described for the chemical isolation and gravimetric determination of total rare earths, including yttrium, in Canadian ores and related products. The method involves a combination of two or more separation procedures, depending on the sample matrix. Precipitation processes are used to disengage the rare earths from macro amounts of interfering ions, while an 8-quinolinol solvent extraction procedure is instrumental in removing low-level impurities. The recovery and the purity of the rare earths are both very good, so that the method provides accurate values for the total rare-earth content. The average relative standard deviation for ores with an average content of 0.17 per cent is ± 1.9 per cent, and for chemical rare-earth concentrate products, with an average content of 39 per cent, the precision is ± 0.2 per cent. The high rejection of non-rare-earth elements also greatly simplifies the subsequent determination of individual rare earths by X-ray emission spectrometry. One sample in duplicate can be processed in about 3 days, while 6 samples can be analyzed within a 5-day period"--Summary, p. i.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.841401&sl=1
Ministère/Organisme | Canada. Natural Resources Canada. Canada. Mines Branch. |
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Titre | The determination of rare earths in Canadian ores. Part I, Chemical isolation and gravimetric determination of total rare earths / D. Barkley, Extraction Metallurgy Division. |
Titre de la série | Technical bulletin ; TB 125 |
Type de publication | Série - Voir l'enregistrement principal |
Langue | [Anglais] |
Format | Électronique |
Document électronique | |
Note(s) | Cover title. "July 1970." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references. Includes summary in French. |
Information sur la publication | Ottawa : Information Canada, 1970. |
Auteur / Contributeur | Barkley, D. |
Description | v, 34 p. |
Numéro de catalogue |
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Numéro de catalogue du ministère | 300010 |
Descripteurs | Minerals Metals Analysis |