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A chemical-spectrochemical method for the determination of rare earth elements and thorium in cerium minerals

Spectrochimica Acta

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Abstract

In a combined chemical-spectrochemical procedure for quantitatively determining rare earth elements in cerium minerals, cerium is determined volumetrically, a total rare earths plus thoria precipitate is separated chemically, the ceria content of the precipitate is raised to 80??0 percent by adding pure ceria, and the resulting mixture is analyzed for lanthanum, praseodymium, neodymium, samarium, gadolinium, yttrium, and thorium spectrochemically by means of the d.c. carbon arc. Spectral lines of singly ionized cerium are used as internal standard lines in the spectrochemical determination which is patterned after Fassel's procedure [1]. Results of testing the method with synthetic mixtures of rare earths and with samples of chemically analyzed cerium minerals show that the coefficient of variation for a quadruplicate determination of any element does not exceed 5??0 (excepting yttrium at concentrations less than 1 percent) and that the method is free of serious systematic error. ?? 1954.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A chemical-spectrochemical method for the determination of rare earth elements and thorium in cerium minerals
Series title:
Spectrochimica Acta
Volume
6
Issue:
2
Year Published:
1954
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Spectrochimica Acta
First page:
161
Last page:
168