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Analysis for Bromine in Electronic Parts 4 Analytical MethodsThe chosen household appliances were separated and the materials selected from outer cabinets, printed circuit boards, where available, switches and other electric parts as well as plastics with direct contact to heating surfaces. By the first screening of the selected parts some large and small plastic components containing bromine and antimony were found. For this screening a Philips EDAX PV9100/9500 energy dispersive X-ray fluorescence spectrofotometer was used. By this relatively fast screening it was possible to sort out plastic parts con-taining brominated flame retardants for further quantitative analysis by the use of elementary analysis and analysis on plane surfaces with Philips PV2400 wavelength dispersive X-ray fluorescence spectrofotometer. On the basis of these results the EDAX equipment was calibrated. In this way it became possible to carry out a quantitative analysis for bromine and antimony of samples not being shaped as plane surfaces. As a consequence of the shape of the samples and for instance content of calcium (Ca) in the plastics, overlapping the analysis for antimony by EDAX, there is a deviation in the results for antimony of up to 25% rel. The accuracy of the bromine value is 10-15% rel.
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