Determination of Percentage Content of the Cation Sulfomethyl Phenolic Resin

Percentage content of cation,or named the cation degree,which is the mass percentage of the cation group in the cationic drilling treating agent,was determined by the modified patassium tetraphenyl boronate gravimetric method. It was experimentally proved that the titrimetric method was not suitable to be used in this case. Feasibility of the modified gravimetry was ascertained by the core recovery.