Abstract
A procedure is described for the determination of Chimassorb 944 in polyolefins. The method is based on high-performance liquid chromatographic (HPLC) analysis of an extract obtained through disintegration of the polymer sample in boiling toluene. The dissolved polymer is then precipitated with methanol, containing triethylamine which prevents sorption of Chimassorb 944 on laboratory glassware and filter-paper. The HPLC determination employs the calibration line method. If the calibration is carried out with Chimassorb 944-Irganox 1010 mixture then an accurate determination of both additives is possible. The detection limit is 0.02% (w/w), the relative standard deviation being lower than 10%.
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