Method for measuring critical micelle concentration of phenol polyoxyethylene ether

A method for measuring critical micelle concentration of phenolic polyoxyethylene ether is characterized by comprising the following steps: step 1, taking 5-15 parts by weight of phenolic polyoxyethylene ether, dissolving the phenolic polyoxyethylene ether in 100-250 parts by weight of water, and uniformly mixing to obtain a phenolic polyoxyethylene ether solution with target concentration; step 2, carrying out gradient dilution on the phenol polyoxyethylene ether solution with the target concentration to obtain a plurality of solutions with different concentrations; 3, carrying out qualitative and quantitative analysis on the solutions with different concentrations under the action of an asymmetric flow field flow meter, and constructing a standard line; and 4, determining the critical micelle concentration of the phenol polyoxyethylene ether based on the condition of the standard line. According to the method, the critical micelle concentration of the surfactant is separated and detected by adopting an asym