TRACE-METAL ASSAY OF THORIUM-OXIDE BY ATOMIC EMISSION-SPECTROMETRY

被引：30

作者：

PORWAL, NK ^{[1
]}

ARGEKAR, AA ^{[1
]}

PUROHIT, PJ ^{[1
]}

PAGE, AG ^{[1
]}

SASTRY, MD ^{[1
]}

机构：

[1] BHABHA ATOM RES CTR,DIV RADIOCHEM,BOMBAY 400085,INDIA

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1990年 / 338卷 / 03期

关键词：

D O I：

10.1007/BF00323019

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An Atomic Emission Spectrometric (AES) method has been developed for the direct determination of twenty-two metallic elements at trace concentrations in thorium oxide. The method is based on the use of a d.c. arc - carrier distillation technique with 12% composition of a mixed carrier, viz. AgCl+SrF2 in 5:1 proportion, and is equally applicable to both volatile and refractory analytes. A direct reading emission spectrometer with computerised data acquisition and processing facility has been used in these studies. The standardisation procedure includes study of volatilisation/excitation characteristics of the analyte elements to optimise choice and proportion of the carrier and signal integration time apart from optimisation of other experimental parameters such as arc current, viewing position of the arc plasma, sample charge etc. The detection limits for the analytes lie in the range 0.1-50 ppm while the precision of determinations is better than 15% for most of the elements as evaluated from the repetitive analyses of spiked samples. © 1990 Springer-Verlag.

引用

页码：255 / 258

页数：4