Spectrophotometric determination of thorium with DBNCPA

Hesheng Qian; Huinong Zhu; Qiuming Huang; Yongsheng Wang; Jiangang Shi

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Spectrophotometric determination of thorium with DBNCPA

更新时间：2022-08-16

- Spectrophotometric determination of thorium with DBNCPA
- Nuclear Techniques Vol. 13, Issue 7, (1990)
- 作者机构：
  
  1.中国纺织大学
  2.上海第二冶金专科学校
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：17 October 1988，
  
  Published：01 July 1990
- 稿件说明：
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Hesheng Qian, Huinong Zhu, Qiuming Huang, et al. Spectrophotometric determination of thorium with DBNCPA[J]. Nuclear techniques, 1990, 13(7): 441-444.
DOI：

Hesheng Qian, Huinong Zhu, Qiuming Huang, et al. Spectrophotometric determination of thorium with DBNCPA[J]. Nuclear techniques, 1990, 13(7): 441-444. DOI：

摘要

本文研究了不对称双偶氮氯磷显色剂二溴硝基偶氮氯膦（DBNCPA）分光光度法测定钍。该试剂在硝酸、盐酸、高氯酸介质能与钍形成稳定络合物。在0.08—0.5mol/l硝酸体系中，钍与DBN-CPA形成1:4的紫色络合物，它的最大吸收峰位于638nm，摩尔吸光系数为6.64×10

。钍浓度在0—15

g/25ml范围内符合比耳定律。19种金属离子不干扰测定。

Abstract

Spectrophotometric determination of thorium with a new reagent 3- (4-chloro-2-phos-phonophenylazo-6- (2

6-dibromo-4-nitrophenylazo) -4

5-dihydroxy-2

7-naphthalene disalfonic acid (DBNCPA) is described. In nitric acid medium (0.08—0.5 mol)

DBNCPA reacts with thorium ion to form a purple complex

which composition is Th:DBNCPA= 1:4. The maximum absorption peaks of DBNCPA and its thorium complex are at 543 and 638nm respectively. The molar absorption is 6.64×10

1/mol·cm. It obeys Beer's law for thorium ranged 0—15

g/25ml

and most of metallic ions do not interfere the determination.

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references

薛光，分析化学，（ 1981 ）， 9 ： 530 。

黎心懿等，化学试剂，（ 1981 ）， 4 : 6 。

余桂珍，冶金分析与测试，（ 1984 ）, 2 : 1 。

刘良书，冶金分析， 6 （ 1986 ）， 1 : 28 。

夏源贤和钱和生，核技术，（ 1986 ）， 1 : 53 。

钱和生和夏源贤，原子能科学技术， 20 （ 1986 ）, 3 : 302 。

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