A Simple Determination of Polyethylene Oxide-type Non-ionic Surfactant by Adhesion Method

A simple and rapid method for the determination of polyethylene oxide-type non-ionic surfactants is reported herein.This method is based on the adhesion of calcium/non-ionic surfactant complexes with tetra phenyl porphine sulfonic acid (TPPS) to the wall of reaction vessel upon vigorous shaking.The ion-associate adhering to the inner wall of the vessel was dissolved with water after discarding the solution and spectrophotometrically assayed at 412 nm.From the standard curve for Triton X-100, the order of the sensitivity for different ions was as follows: Ca 2+ > K + > NH 4 + > Ba 2+ .The proposed method does not involve extraction of the ion-associated with harmful solvents and can be simply performed by combining a procedure based on hand shaking and the use of a spectrophotometer.

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