Assay of micro-scale amounts of hydroperoxide and of iodine in aqueous non-ionic surfactant solutions by a spectrophotometric method

Abstract

An iodimetric-ultraviolet spectrophotometric method has been developed for the quantitative determination of trace concentrations of hydroperoxide (down to 10^–6M) in the presence of etheric non-ionic surface-active agents. It involves a simple extrapolation procedure based on the kinetics of iodine fading in these systems. This method was also applicable to macro-scale amounts when the classical titrimetric method could not be used. Hydrogen peroxide and hydroperoxides of some polyethylene glycols, in the presence of Cetomacrogol 1000, gave reproducible results that were in good agreement with the results obtained by use of the titrimetric method.