Suppression of Selective Volatilization in a Method for the Spectrographic Analysis of Lanthanum

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The effects of electrode type, are current, and the Stallwood Jet on selective distillation of impurities other than rare earths in La2O3 are evaluated. Selective volatilization is reduced by use of a 20-A dc arc with a ⅛-in.-diam electrode. An analytical method incorporating these operating conditions is presented for 19 impurity elements in La2O3 prepared from the lanthanum metal sample. The overall precision is about ±14% relative standard deviation over the concentration range of 30 to 1000 parts per million.

Document Type: Research Article


Affiliations: Reno Metallurgy Research Center, Bureau of Mines, U. S. Department of the Interior, Reno, Nevada

Publication date: March 1, 1966

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