The sorption-coprecipitation of trace amounts of Th in sea water by basic magnesium carbonate and method of Th determination

Qixiang Xiang; Weizong Min; Zhiyong Ni; Hongying Yuan

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The sorption-coprecipitation of trace amounts of Th in sea water by basic magnesium carbonate and method of Th determination

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- The sorption-coprecipitation of trace amounts of Th in sea water by basic magnesium carbonate and method of Th determination
- Nuclear Techniques Vol. 05, Issue 3, (1982)
- 作者机构：
  
  四川大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 June 1980，
  
  Published：1982-06
- 稿件说明：
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Qixiang Xiang, Weizong Min, Zhiyong Ni, et al. The sorption-coprecipitation of trace amounts of Th in sea water by basic magnesium carbonate and method of Th determination[J]. Nuclear techniques, 1982, 05(3): 62-64.
DOI：

Qixiang Xiang, Weizong Min, Zhiyong Ni, et al. The sorption-coprecipitation of trace amounts of Th in sea water by basic magnesium carbonate and method of Th determination[J]. Nuclear techniques, 1982, 05(3): 62-64. DOI：

摘要

目前，海水中痕量钍测定的报导不多，由于海水成份较为复杂，钍含量又极微

[1-2］

，现有测定多采用放射性分析。本文在痕量钚测定工作的基础上，建立了一种海水中痕量钍的分光光度测定法。我们的实验首次证明，碱式碳酸镁对水相中痕量钍是优良的吸附共沉淀剂。在此基础上研究了海水中痕量钍的碱式碳酸镁浓集、TBP萃取和偶氮胂Ⅲ分光光度测定法。此法能测定10

-6

~10

-8

g/1数量级范围内的钍（回收率95%以上），精密度较高（相对标准偏差≤14%），最低检出浓度达到5.0×10

-8

g/1，一般海水中的杂质不干扰钍的测定。

Abstract

In this paper the adsorbing properties of the basic magnesium carbonate for the Th in sea water and a spectrophotometric method are described. For Th concentration of 10

-6

~10

-8

g/l the recovery is greater than 95%. The precision of the method

expressed by the standard error

is ≤ 14%. The lowest limit of the determination of Th has reached 5.0×10

-8

g/l

and the coexisting ions in sea water don't interfere the determination and recovery of Th.

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references

张正斌和刘莲生，科学通报， 4~5 , 164 （ 1977 ）.

Y. Miyake et al . , Recent researches in the fields of hydroshere, atmosphere and nuclear geochemistry , Maruzen , Tokyo , p. 127 .

项其祥等，化学通报， 5 , 55 （ 1979 ）.

环境放射性监测方法编写组，环境放射性监测方法，原子能出版社， 1977 年，第270页．

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