Title: PHOTOMETRIC DETERMINATION OF THE TOTAL RARE EARTHS IN NATURAL MATERIALS
Abstract: Conditions were found for the determination of rare earths with arsenazo I in the presence of less or equal amounts of thorium using lactic acid as a masking agent. A study was made of the iodate method for separating thorium from rare earths from a tartaric-nitric acid medium in the presence of hydrogen peroxide and mercuric nitrate as a coprecipitator. A photometric method is suggested for the determination of 0.02--3% of rare earths in ores containing thorium, titanium, and zirconium. (auth)
Publication Year: 1963
Publication Date: 1963-12-01
Language: en
Type: article
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