期刊论文

Liao, Y;Wang, M

英文

Journal of Nuclear Science and Technology

0022-3131

2024

10.1080/00223131.2024.2361655

National Natural Science Foundation of China [12005095]; Natural Science Foundation of Hunan Province, China [2022JJ30487, 2021JJ40447]; Research and Innovative Experiment Program for College Students in Hunan Province, China [S202210555140, S202310555260, S202310555170]; Project of Young Backbone Teacher of Hunan Province, China [221RQG004]; Graduate Research Innovation Project of Hunan Province, China [CX20230975]; State Foundation for Studying Abroad [202108430096]

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The complexation interaction between arsenazo III chromogenic agent and tetravalent thorium ion (Th4+) is the theoretical basis for the determination of thorium by spectrophotometry. In this paper, the effects of the acidity, temperature, interfering ions and Th4+ concentration on the absorbance and stability of arsenazo III-Th4+ solution by spectrophotometry were systematically studied. The results showed that the solutions to be tested had high absorbance values and stability only when the concentration of hydrochloric acid was greater than 6 molL-1. The absorbance decreased only 0.02 when t...