Determination of copper and gold trace impurities in high purity gallium by activation analysis with pretreatment

LG NAGY LG, G TOROK G, J GIBER J, L SZOKOLYI L

Research output: Contribution to journalArticle

Abstract

The selection of investigative suitable for gallium is subject to limitations imposed by its nuclear half life. The objective was to develop a method suitable for destructive activation analysis of gallium in laboratories for medium activity levels. Hence, it was necessary to decrease the activity of the gallium matrix by at least two orders of magnitude, as by pretreating the sample before activation. A distillation method was developed to remove the gallium matrix, utilizing the significant vapor tension differences between the galliumtrichloride and the chlorides of the investigated impurities. The main point of the method is the reaction between the metallic gallium sample and dry chlorine gas, removing 99% of the gallium matrix. After the distillation process as well defined portion of the investigated impurities is retained, and the distillation efficiency is governed by technological factors. It was possible to determine the copper content at a concentration range of 10- //6 to 10- //7 g/g with plus or minus 40% deviation, and the gold content at a concentration range of 10- //8 to 10- //9 g/g with plus or minus 50% deviation.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalPeriodica Polytechnica Chemical Engineering
Volume14
Issue number2
Publication statusPublished - Jan 1 1970

ASJC Scopus subject areas

  • Chemical Engineering(all)

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