Quantitative Determinnation of the Anionic Surfactant in Enhanced Oil Recovery

Confirmed one way to quantify the anionic surfactant in EOR(enhance oil recovery)-visible spectrophotometry.Found the best condition of the method,which is the maximum wavelength 630nm,the cationic surfactant standard solution(1×10-4mol/L) 20mL,the bufferindicator 10ml,the waiting time 2h and the temperature 25℃.Simultaneously,determined the best concentration range of the anionic surfactant,half of the cationic surfactant.The liner correlation coefficient of the working curves was 0.99972.Measured the work line of other common anionic surfactant in EOR,which liner correlation coefficient were all bigger than 0.99.So this method can be applied widely.