Microwave digestion of thermoluminescent aluminium-oxide powders and determination of trace impurities by inductively coupled plasma optical emission spectroscopy

Gábor Molnár, József Borossay, Zsuzsanna B. Varga, Mária Ballók, András Bartha

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Five commercial and three laboratory prepared thermoluminescent aluminium-oxide powders as well as three reference samples were digested by a microwave digestion system and the impurities were determined by ICP-OES. The physico-chemical properties of the different samples were found to influence highly the decomposition efficiency. Optimized decomposition parameters were determined for the samples with different physico-chemical properties (phase composition, grain size). The detection limits of the impurities of interest are presented, the analysis results for the aluminium-oxide dosimetric samples and the standards are given as well for Be, Ca, Ce, Cu, Fe, Cd, Mg, Mo, Na, Ni, Ti and Zn in the <2-400 μg/g range.

Original languageEnglish
Pages (from-to)193-197
Number of pages5
JournalMikrochimica Acta
Volume134
Issue number3-4
DOIs
Publication statusPublished - Dec 1 2000

Keywords

  • Aluminium-oxide
  • ICP-OES
  • Microwave assisted acid digestion
  • Thermoluminescence

ASJC Scopus subject areas

  • Analytical Chemistry

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