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Determination of trace elements for environmental monitoring purposes using Proton Induced X-ray Emission (PIXE) and Energy Dispersive X-ray Fluorescence (EDXRF) techniques.

Within the frame of ACE 89 programme in our demonstration project, three different X-ray spectrometry techniques were tested, compared and applied to environmental analytical chemistry. These techniques used are Proton Induced X-ray Emission (PIXE), Energy Dispersive X-ray Fluorescence (EDXRF) and Total Reflection X-ray Fluorescence (TXRF). After the acquisition of the TXRF equipment with financial support of the EC, the TXRF technique was set-up at INETI. The aim of the project was to check each one, for their suitability and reliability to perform multi-element analyses of waters, wastewaters, biological, sediments and contaminated soils samples.

The most efficient of these trace-element monitoring techniques was shown to be TXRF for its low detection limits. The purpose is now to apply an adequate scheme of Quality Assurance to TXRF laboratory.

Reported by

Instituto Nacional de Engenharia e Tecnologia Industrial
Azinhaga dos Lameiros
1649-038 Lisboa
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