Determination of silicone fluid surfactants in polyurethane/polyether blends by atomic-absorption spectroscopy |
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| Authors: | Duncan G Herridge R J |
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| Affiliation: | Department of Chemistry and Biology John Dalton Faculty of Technology Manchester Polytechnic Chester St., Manchester 1, U.K. |
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| Abstract: | A method for the atomic-absorption determination of silicone fluid surfactants present in some polyurethane/polyether blends is described. The silicone fluid in the pure state, or in the presence of polyurethane blend, is diluted with a solvent and sprayed into the nitrous oxide/acetylene flame. The effects of solvent, instrumental conditions, time and presence of the polyurethane blends were investigated. Polyurethane/polyether blends do not interfere with the silicon absorption when the samples are dissolved in aqueous ethanol (1:1) and sprayed into a fuel-rich flame. |
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