SENSITIVE SPECTROPHOTOMETRIC DETERMINATION OF LANTHANUM WITH 2-(3,5-DICHLORO-2-PYRIDYLAZO)-5-DIMETHYLAMINOPHENOL

被引：7

作者：

FERNANDEZ, L

OLSINA, R

机构：

[1] Department of Analytical Chemistry, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis, San Luis, P. O. Box 375

来源：

ANALYTICAL SCIENCES | 1990年 / 6卷 / 03期

关键词：

2-(3,5-dichloro-2-pyridylazo)-5-dimethylaminophenol; Lanthanum; spectrophotometric determination;

D O I：

10.2116/analsci.6.411

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The reagent 2-(3,5-dichloro-2-pyridylazo)-5-dimethylaminophenol (3,5-diClDMPAP) has been synthesized and its analytical properties investigated. This reagent can be used for the spectrophotometric determination of La(IIl) in concentrations ranging from 0.045 to 0J2 ppm. The reaction takes place at a pH between 9 and 10.8. In the presence of Triton X-100 this complex is soluble in water (ε;=1.45X1051 mol-1 cm-1). The maximun tolerances for cations as well as for any anions were determined. In order to overcome difficulties caused by the presence of other lanthanides, an ion exchange chromatographic technique was used. © 1990, The Japan Society for Analytical Chemistry. All rights reserved.

引用

页码：411 / 414

页数：4

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