Determination of Hg concentration in gases by PIXE

Details Determination of Hg concentration in gases by PIXE Determination of Hg concentration in gases by PIXE

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nimpb..68..305d&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section B, Volume 68, Issue 1-4, p. 305-305.

Physics

Scientific paper

A method for determination of the concentration of mercury in the gaseous phase is described. In the first step of the method a stable sulphur-mercury complex is formed. For this purpose sulphur is deposited on a filter and the investigated gas flows through the filter. Millipore filters and the deposition of sulphur from Na2S2O3 * 5H2O solution were found to be most suitable. The amount of Hg absorbed on the filter was determined by PIXE or by NAA in the second step of the method. An optimization of proton energy was performed in the PIXE analysis to obtain the maximal signal-to-background ratio. The detection limit of the method, expressed as the minimal amount of Hg which has to flow through the filter equals to 30 and 2 ng for PIXE and NAA techniques, respectively. Applications of the method are also described.

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