Differential-Kinetic Determination of Microamounts of Thorium in Soils.

Autor:	Stepanov, A. V., Makarova, T. P., Pevtsova, E. V.
Předmět:	THORIUM SOIL composition CHEMICAL kinetics ACIDS CHEMICAL decomposition SEPARATION (Technology)
Zdroj:	Radiochemistry; Mar/Apr2003, Vol. 45 Issue 2, p155-158, 4p
Abstrakt:	Microamounts of thorium in soils can be determined by a differential-kinetic method based on the kinetic properties of the complex of thorium with 1,2-cyclohexanediaminetetraacetic acid (ThDCTA). The thorium content was determined spectrophotometrically upon decomposition of this complex in 0.1 M HNO3 in the presence of Arsenazo III. The method involves anion-exchange isolation of Th from solution obtained by degradation of the soil material; it allows thorium determination in the presence of a number of impurities, which poses less stringent requirements on thorium separation from these impurities. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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