Determination of silicone fluid surfactants in polyurethane/polyether blends by atomic-absorption spectroscopy.
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.
Duncan
G
G
Department of Chemistry and Biology John Dalton Faculty of Technology Manchester Polytechnic Chester St., Manchester 1, U.K.
Herridge
R J
RJ