No abstract

A procedure is described for determining the polyoxyethylene content of samples of ethoxylated materials in the range 50-500pg, such as those extracted from biodegradability tests on non-ionic detergents, surface waters, effluents or other media containing these species at very low concentrations.The method, which is an adaptation of the hydrogen bromide fissiongaschromatographic method for determining the oxyalky lene ratio in copolymers, is applicable to materials that have short polyoxyethylene chains in addition to those in the typical non-ionic detergent range.