针对传统滴定检测法的灵敏度低、抗干扰能力差、检测周期长等不足,本文利用液相色谱串联四级杆质谱联用仪建立了油田用烯烃磺酸盐的检测方法,实现了该类产品、注入液及产出液中目标物浓度的检测,检测条件为：色谱柱为阴离子型色谱柱；流动相为55% 甲醇+45% 8mmol/L乙酸铵水溶液(体积比),等度洗脱；质谱检测条件为电喷雾离子源,负模式,全扫描。该方法对烯烃磺酸盐产品、注入液、产出液的加标回收率分别为82.63-96.37%、78.60-95.41%、82.68-95.72%,8 min即完成一次样品检测,定量下限5 ppm,且聚合物、微量油等对检测结果无影响,即该方法快速、灵敏、抗干扰能力强。
Aiming at the disadvantages of traditional titration detection methods such as low sensitivity, poor anti-interference ability, and long detection period, this paper uses liquid chromatography tandem quadrupole mass spectrometer to establish a detection method for α-olefin sulfonates used in oil and gas fields, and realizes the detection of target concentration in olefin sulfonate products, injection fluid and produced fluid. The detection conditions are as follows: the chromatographic column is an anionic column; the mobile phase is 55% methanol + 45% 8 mmol/L ammonium acetate aqueous solution (volume ratio), isocratic Elution; mass spectrometry detection conditions are electrospray ion source, negative mode, full scan. The recovery rates of this method for olefin sulfonate products, injection fluid, and produced fluid were 82.63-96.37%, 78.60-95.41%, 82.68-95.72%, respectively. One sample detection was completed in 8 minutes, and the lower limit of quantification was 5 ppm. And polymer, trace oil, etc. have no effect on the detection result, that is, the method is fast, sensitive, and has strong anti-interference ability.