3-亚硝基-4-羟基-5,6-苯并香豆素作为分光光度法测定钌(III)的选择性试剂。

3-Nitroso-4-hydroxy-5,6-benzocoumarin as a selective reagent for the spectrophotometric determination of ruthenium(III).

作者信息

Kohli N, Singh R P

机构信息

Department of Chemistry University of Delhi Delhi-110007, India.

出版信息

Talanta. 1974 Jun;21(6):638-41. doi: 10.1016/0039-9140(74)80202-x.

DOI:10.1016/0039-9140(74)80202-x

PMID:18961508

Abstract

The pinkish-violet complex developed on interaction of ruthenium(III) with 3-nitroso-4-hydroxy-5,6-benzocoumarin (NHBC) in the pH range 5.5-8.0 can be extracted into n-butanol. The complex has an absorption maximum at 520 nm. Maximum colour development takes place after heating for 20 min on a steam-bath and the extracted complex is stable for at least 92 hr. Beer's law is followed up to 7.4 ppm of ruthenium. The molar absorptivity is 1.04 x 10(4) 1.mole(-1).cm(-1). The composition of the complex is 1 : 2 (ruthenium: NHBC). None of the other platinum metals was found to interfere in the determination of ruthenium, even though present in large excess.

摘要

在pH值为5.5至8.0的范围内，钌（III）与3-亚硝基-4-羟基-5,6-苯并香豆素（NHBC）相互作用形成的粉紫色络合物可被萃取到正丁醇中。该络合物在520nm处有最大吸收峰。在蒸汽浴上加热20分钟后颜色发展到最大值，萃取后的络合物至少稳定92小时。在钌含量高达7.4ppm时符合比尔定律。摩尔吸光系数为1.04×10⁴ 1·mol⁻¹·cm⁻¹。该络合物的组成是1:2（钌:NHBC）。即使其他铂族金属大量存在，也未发现它们干扰钌的测定。