The determination of rare earths in Canadian ores.: 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.

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Department/Agency Natural Resources Canada. Mines Branch.
Title The determination of rare earths in Canadian ores.
Series Title Technical bulletin ;
Publication Type Series - View Master Record
Language [English]
Format Electronic
Electronic Document

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Note Cover title. "July 1970." Digitized edition from print [produced by Natural Resources Canada].
Date 1970.
Number of Pages v, 34 p.
Catalogue Number
  • M34-20/125E-PDF
Departmental Catalogue Number 300010
Subject Terms Minerals, Metals, Analysis