| 11. |
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| 12. |
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| 13. |
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| 14. |
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| 15. |
- Johansson, Gerd, et al.
(författare)
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Luftföroreningar vid svetsning
- 1978
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Beskrivning ges av utveckling av analysuppställning för PIXE-analys, kombinerad med metod för analys av fluor. Vidareutveckling av spektrumevalueringsprogram, HEX, presenteras. Beskrivning av utförda svetsröskarakteriseringar ges. Resultat redovisas för följande belagda elektroder: OK 48.00, OK 38.65 samt OK 61.41. För sistnämnda, rostfria elektrod, presenteras procedur för bestämning av kroms valenstal och löslighet.
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| 16. |
- Johansson, Gerd, et al.
(författare)
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Particle-Induced X-Ray Emission: A Useful Analytical Method
- 1978
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Ingår i: Proceedings of Analyt. Div. Chem. Soc.. ; 15, s. 24-27
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Konferensbidrag (refereegranskat)abstract
- Abstract in UndeterminedIn 1970, it was shown experimentally by Johansson et al. that the excitation of atoms by charged particles, e.g. protons, and the subsequent detection of the induced X-rays by an energy-dispersive detector constitutes a non-destructive multi-elemental method with low detection limits and several other properties desirable in an analytical method. Since then, many investigations have been performed and the method, known as particle-induced X-ray emission (PIXE), has been developed further. The development of suitable methods of pretreating samples for PIXE analysis has also been intensively pursued. In the Proceedings of the International Conference of Particle-induced X-ray Emission, the method and its applications are thoroughly reviewed. Two reviews have also recently been published.In this summary, the principles and properties of PIXE are discussed. Possible areas of application are briefly discussed, and limits of detection of elements in blood plasma are considered.
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| 17. |
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| 18. |
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| 19. |
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| 20. |
- Johansson, Thomas B, et al.
(författare)
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Analytical Use of Proton-Induced X-Ray Emission
- 1976
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Ingår i: Journal of Radioanalytical and Nuclear Chemistry. - 0236-5731. ; 32:1, s. 207-217
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Tidskriftsartikel (refereegranskat)abstract
- Proton-induced X-ray emission, PIXE, is capable of simultaneous quantitative determination of 10-15 elements. An introduction to the physical properties of the method is given and detection limits are shown for a routine analysis of a thin aerosol sample. Examples of applications to both thick and thin samples are presented. Human tooth dentine is analysed for lead, with simple sample preparation, indicating lead values of a few ppm for Swedish children. Quantitative analyses of several other elements are obtained simultaneously. Cascade impactors axe used for sampling aerosols in work environment during welding operations giving information of size distribution and concentrations of the elements present. The aerosol is dominated by particle sizes between 0.5 and 2 um as measured by the impactor, but the size distributions are different for different elements and welding techniques and depend on the distance from the welding source. The relative abundance of the elements found in the aerosol indicates the presence of fractionation mechanisms.
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