用7-碘-8-羟基喹啉-5-磺酸溶剂萃取和分光光度法测定钯（II）

Solvent extraction and spectrophotometric determination of palladium(II) with 7-iodo-8-hydroxyquinoline-5-sulphonic acid.

作者信息

Singh T, Dey A K

机构信息

Chemical Laboratories University of Allahabad Allahabad, India.

出版信息

Talanta. 1971 Feb;18(2):225-8. doi: 10.1016/0039-9140(71)80030-9.

DOI:10.1016/0039-9140(71)80030-9

PMID:18960876

Abstract

An extractive spectrophotometric procedure has been developed for the determination of palladium (II) at microgram levels. The palladium(II) chelate of 7-iodo-8-hydroxyquinoline-5-sulphonic acid is extracted into n-butanol. Extraction is maximal (95%) from 0.2M perchloric acid. Beer's law is valid at 430 nm over a wide range of palladium concentration from 2.5 ppm. The molar absorptivity is 958 1.mole(-1).mm(-1). The system can tolerate a large excess of Co(II), Ni(II), Rh(III), Pt(IV), Cr(III), W(VI), chloride, phosphate, citrate and tartrate. Small quantities of Ru(III), IR(III) and EDTA do not interfere, but serious interference is caused by Fe(III), V(V), Mo(VI) and Os(VIII).

摘要

已开发出一种萃取分光光度法，用于测定微克级的钯（II）。7-碘-8-羟基喹啉-5-磺酸的钯（II）螯合物被萃取到正丁醇中。在0.2M高氯酸中萃取率最高（95%）。在430nm波长下，钯浓度在2.5ppm的宽范围内符合比尔定律。摩尔吸光系数为958 l·mol⁻¹·mm⁻¹。该体系能耐受大量过量的Co（II）、Ni（II）、Rh（III）、Pt（IV）、Cr（III）、W（VI）、氯离子、磷酸根、柠檬酸根和酒石酸根。少量的Ru（III）、Ir（III）和EDTA不产生干扰，但Fe（III）、V（V）、Mo（VI）和Os（VIII）会造成严重干扰。