Synthesis of bromophosphonazo-mN and its colour reaction with U (Ⅵ)

Qingping Han; Weichang Lu; Yanpei Zhou; Banglin Chen; Bincai Wu; Hengchuan Liu

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Synthesis of bromophosphonazo-mN and its colour reaction with U (Ⅵ)

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- Synthesis of bromophosphonazo-mN and its colour reaction with U (Ⅵ)
- Nuclear Techniques Vol. 11, Issue 2, (1988)
- 作者机构：
  
  华东师范大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：29 December 1986，
  
  Published：1988-02
- 稿件说明：
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Qingping Han, Weichang Lu, Yanpei Zhou, et al. Synthesis of bromophosphonazo-mN and its colour reaction with U (Ⅵ)[J]. Nuclear techniques, 1988, 11(2): 21-24,28,61.
DOI：

Qingping Han, Weichang Lu, Yanpei Zhou, et al. Synthesis of bromophosphonazo-mN and its colour reaction with U (Ⅵ)[J]. Nuclear techniques, 1988, 11(2): 21-24,28,61. DOI：

摘要

本文主要介绍偶氮溴膦-mN（BPA-mN）的合成方法及其与铀（Ⅵ）的显色反应条件和性能。显色剂的合成采用由间硝基苯胺制得重氮盐，再与中间体偶联的工艺路线。经实验得出本试剂在强酸性介质中与铀（Ⅵ）生成稳定的兰紫色络合物，最大吸收峰在684nm处，在25ml中含铀量在0—45

g，符合比耳定律，其摩尔吸光系数

684

＝8.4×10

，加入非离子型表面活性剂后，测铀灵敏度有明显提高，摩尔吸光系数提高到

684

＝1.0×10

。Fe

、Al

、 Ca

对显色反应干扰大，但加入掩蔽剂对Al

、Ca

有一定的掩蔽作用。本方法具有灵敏度高、选择性好、络合物稳定等特点。本试剂能作为铀（Ⅵ）分光光度法的新试剂。

Abstract

The synthetic procedure of the titled reagent and its colour reaction with U (Ⅵ) is reported. The reagent was obtained by the coupling reaction of m-nitroanilinediazonium salt with bromophosphonazo I. It formed a stable blue-purple complex with U (Ⅵ) in a strong acidic medium and the wavelength of maximum absorbance was observed at 684nm. Beer's law was obeyed over the range of 0—45

g U (Ⅵ) in 25 ml. The value of molar absorptivity at 684 nm was found to be 8.4×10

1•mol

-1

•cm

-1

and 1.0×10

1•mol

-1

•cm

-1

in the presence of the nonionic surfactant

Triton X-100. The foreign ions such as Fe (Ⅲ)

Al (Ⅲ)

Ca (Ⅱ)

etc. produced interference on colour reaction but Al (Ⅲ) and Ca (Ⅱ) could be masked with masking reagents. The outstanding advantages of this method are simplicity

high sensitivity and good selectivity as well as the complex is very stable. The reagent is suitable for applied to the direct spectrophotometric determination of microgram amounts of U (Ⅵ) and the results are found to be satisfactory.

关键词

Keywords

references

董灵英主编，铀的分析化学，原子能出版社， 1982 年，第145页。

J. Borak et al . , Talanta , 17 , ( 1970 ) . 215 .

Y. Tadashi , Anal. Chim. Acta , 65 , ( 1973 ) . 329 .

K. L. Cheng , Anal. Chem. , 30 , ( 1958 ), 1027 .

吴斌才等，化学试剂，（ 1984 ）， 5 ： 269 。

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