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Applications Analysis of Air Pollution Samples

A matrix of light elements (e.g. plastic, or organic tissue) containing a large number of trace elements constitutes an ideal sample for PIXE analysis, and air pollution samples provide a good example of the technique. [Pg.103]

The sample environment was filled with He gas to prevent the argon X-ray emission from air. Beam scanning, data acquisition, evaluation and the generation of elemental maps were controlled by a computer. Micro-PIXE measurements were performed with a scanning 2.5MeVH+ microbeam accelerated by the 3 MV single-end accelerator. The beam diameter was 1-2 pm, so that individual particles could be analysed. The beam current was 100 pA and the irradiation time was about 3(M0 min. [Pg.103]

More than 20 Si-containing particles are seen to exist within the 25 pm2 area shown. Ca, Fe and Si were found to be the most abundant components in single particles. [Pg.105]

Faiz et al. (1996) have applied micro-PIXE analysis to study solute distributions in a single crystal sample of YiBa2Cu307 5 high temperature superconductor (YBCO) of dimensions 1.3 mm x 1.5 mm x 75 pm. It contained a small secondary crystal overgrowth of dimensions 340 x 340 x 100 pm3. The interface region between the smaller crystal and the base crystal was covered with a material which appeared to be residual flux. The instrument employed a 2.5 MeV focused proton beam of about 4 pm resolution, which could scan an area of 500 x 500 pm2 on the sample surface. The microbeam current was kept low (typically about 30 pA) to avoid any damage to the sample. [Pg.105]

An average compositional spectrum as well as two-dimensional element distribution maps were acquired simultaneously from each scanned area. Line spectra could also be obtained by allowing the microbeam to scan along a line across the crystal face. The authors examined the base crystal, the smaller crystal as well as the interface region. [Pg.105]


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Air pollution analyses

Air sampling

Analysis of air

Analysis, applications

Application of samples

Pollutants of air

Pollution, of air

Sample application

Sample applicator

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