The TTA solution of PTAMgCl2 was simplified by adding 10 ml of TRIS(cas 77861)HCl buffer solution instead of distilled water, and 0.7 mL of TRIS(cas 77861) solution with concentration of 0.050 mol /L was added. The linear regression equation was A = 0.0283c + 0.1135, the correlation coefficient R = 0.9904, and the relative error of the measurement was less than 5%. The improved method was used for the linear regression equation of TA1031 solution, TAI031 concentration was 0 ~ 36 mg /L, The linear range of the demulsifier LE28E and the demulsifier CZ was 0 ~ 40 mg /L and 0 ~ 45 mg /L, respectively, and the correlation coefficients were 0.9953 and 0.9929, respectively.
The method of spectrophotometric determination of TA1031 in nonionic polyether demulsifier for oilfield wastewater was established by using ternary complex principle of phosphotungstic acid (PTA) MgCl2demulsifier. The optimum conditions were as follows: the wavelength was 480 nm, 10% MgCl2 solution 0.4 mL, 10% PTA 1 mL, 5% hydroquinone sulfuric acid solution 3 mL, the pH value of the solution is 2.0, the reaction rest time is 5 min. When the mass concentration of TA1031 is in the range of 0 ~ 30 mg /L, The linear regression equation is: A = 0.0378c + 0.0083, the correlation coefficient R = 0.9912.
