Determination of thorium in human urine by co-precipitation method with bismuth phosphate
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Determination of thorium in human urine by co-precipitation method with bismuth phosphate
磷酸铋共沉淀法测定人尿中的钍
Nuclear Techniques1980年03卷第4期
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收稿日期:1979-02-16,
纸质出版日期:1980-08
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Shanghai Industrial Hygiene Institute. Determination of thorium in human urine by co-precipitation method with bismuth phosphate[J]. Nuclear Techniques, 1980,03(4):50-52.
Shanghai Industrial Hygiene Institute. Determination of thorium in human urine by co-precipitation method with bismuth phosphate[J]. Nuclear Techniques, 1980,03(4):50-52.DOI:
Bismuth nitrate and phosphonic acid produce co-precipitation of bismuth phosphatethorium in 0.2
M
nitric acid system. The developing reaction of thorium to arsenazo III is determined by colorimetry. Sodium hexameta-phosphate is used to break up the developing chelating structure between arsenazo III and thorium so as to minimize the interference in measurement. The measurable limit of this method is 0.2µg. When 0.2µg thorium is added to the urine
its recovery rate is around 90%
with±10%relative error.
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