Analysis of red phosphorus in resins using pyrolysis-gas chromatography/mass spectrometry. |
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Authors: | Masuo Iida Kenichiro Miyatake Atsushi Kimura |
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Affiliation: | Analysis Technology Research Center, Sumitomo Electric Industries, Ltd., Osaka, Japan. iida-masuo@sei.co.jp |
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Abstract: | Although red phosphorus is used as a flame retardant for polymer materials, no analysis methods for it in resins has been established. Analysis methods for red phosphorus in resins were investigated using pyrolysis-gas chromatograpy/mass spectrometry (Py-GC/MS) by paying attention to the fact that it has a sublimation property. We found that the mass spectrum of red phosphorus shows a series of ions at m/z=62, 93 and 124, and a fragment pattern indicating that red phosphorus (P4=124, P=31) was pyrolytically decomposed. The coefficient of the correlation between the content of red phosphorus in the resin and the peak intensity in Py-GC/MS was 0.9781. The relative standard deviations of this analysis method was 6.29% (n=5). Py-GC/MS was applicable not only to qualitative analysis but also to the quantitative analysis of red phosphorus. |
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