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PHOTOMETRIC DETERMINATION OF THE SUM OF RARE EARTHS IN ORES AND ROCKS

F.V. Zailovskii, V.S. Bashmakova

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Abstract

BS>It was found that Beer's law is obeyed by the solutions of cerium and yttrium rare earth complexes with arsenazo. The interference of calcium and other elements during photometoring is eliminated with sulfosalycylic and tartaric acids. A method is suggested for separating small amounts of thorium from the sum of rare earths. A photometric method was developed for determining 0.01 to 3% of the sum of rare earths in ores and rocks with the experimental error of 20%. It is possible to carry out 8 to 10 analyses in the course of 8 to 10 hours. (auth)

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BS>It was found that Beer's law is obeyed by the solutions of cerium and yttrium rare earth complexes with arsenazo. The interference of calcium and other elements during photometoring is eliminated with sulfosalycylic and tartaric acids. A method is suggested for separating small amounts of thorium from the sum of rare earths. A photometric method was developed for determining 0.01 to 3% of the sum of rare earths in ores and rocks with the experimental error of 20%. It is possible to carry out 8 to 10 analyses in the course of 8 to 10 hours. (auth)

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Available abstract

BS>It was found that Beer's law is obeyed by the solutions of cerium and yttrium rare earth complexes with arsenazo. The interference of calcium and other elements during photometoring is eliminated with sulfosalycylic and tartaric acids. A method is suggested for separating small amounts of thorium from the sum of rare earths. A photometric method was developed for determining 0.01 to 3% of the sum of rare earths in ores and rocks with the experimental error of 20%. It is possible to carry out 8 to 10 analyses in the course of 8 to 10 hours. (auth)

Key concepts: Cerium, Thorium, Yttrium, Rare earth, Uranium, Chemistry, Mineralogy, Radiochemistry

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