Ecology, Environment and Conservation Paper

Vol 23, Issue 1, 2017; Page No.(508-515)

ON APPLICATION OF THERMAL DESORPTION MASS SPECTROMETRY FOR DETECTION OF BERYLLIUM HYDROXIDE

A. P. Koscheev1, D.P. Gubanova , V.M. Minashkin, S.A. Bondarenko1, and L.O. Shoranova

Abstract

This work investigates into the possibility of application of thermal desorption mass spectrometry (TDMS) for detection of beryllium hydroxide aerosols upon beryllium production. Beryllium hydroxide production on the basis of ores of Ermakovo deposit using innovation technology is considered, in particular, the stages where beryllium hydroxide aerosols are formed. Model system fiberglass filter–metal hydroxide is studied for estimation of the TDMS efficiency. Data on mass spectra and temperature profiles of volatile components evolved upon pyrolysis of fiberglass filters have been obtained. Thermal desorption profiles of water are calculated for fiberglass filters with various content of metal hydroxide. It is demonstrated that using mass spectrometry analysis of gas evolution upon high temperature vacuum pyrolysis it is possible to determine composition of beryllium aerosol particles on fiberglass analytical filters. Improvement of sensitivity of the proposed method due to decrease in background water extraction from filter in the range of thermal hydroxide decomposition by preliminary filter heating in vacuum is described. The achievedresults confirmed potentials of the TDMS for detection of content of beryllium hydroxide aerosols upon its production.

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