三次采油用月桂醇聚氧乙烯醚非离子表面活性剂的高效液相色谱分析检测方法

Analytical Method of Nonionic Surfactant of Laurel Alcohol Polyoxyethylene Ether Used for Tertiary Oil Recovery by High Performance Liquid Chromatography

温 静 肖传敏 张艳娟 王立成 郭 勇

WEN Jing XIAO Chuanmin ZHANG Yanjuan WANG Licheng GUO Yong

为了建立三次采油用月桂醇聚氧乙烯醚非离子表面活性剂的液相色谱分析检测方法，通过对色谱要素的优化实验，确立了最佳色谱条件，并进行了方法学评价。实验确定色谱柱为羟基柱，规格为 150 mm×4.6 mm；流动相为乙腈与水；梯度洗脱（0～3 min：25%乙腈/75%水；3～8 min：90%乙腈/10%水；8.01 min：25%乙腈/75%水）；流速为1.0 mL/min；质谱检测器正模式检测；进样量为2 μL。该方法在 20～200 mg/L 浓度范围内线性相关系数R=0.99998，检出限低至 5 mg/L，加标回收率在 88.10%～97.14%之间，10 min 完成一次分析，展现了检测结果准确、检测方法灵敏、快速的色谱学优点，能够满足复杂采出液中月桂醇聚氧乙烯醚非离子表面活性剂的定量检测。因采用质谱检测器，可同时开展油井采出液中月桂醇聚氧乙烯醚非离子表面活性剂的结构鉴定。

In order to establish an analytical method of nonionic surfactant of laurel alcohol polyoxyethylene ether used for tertiary oil recovery by high performance liquid chromatography，The best conditions were established by optimizing the chromatographic elements and the method was evaluated consequently. As a result，the chromatographic column was a 15 cm × 4.6 mm hydroxyl column；the mobile phase was consisted of acetonitrile and water using gradient elution（0—3 min：25% acetonitrile/75% water；3—8 min：90% acetonitrile/10% water；8.01 min：25% acetonitrile/75% water）with the flow rate of 1.0 mL/min. Mass detector with positive mode was used for detecting nonionic surfactant and the injection volume was 2 μL. The linear correlation coefficient R was 0.99998 in the concentration range of 20—200 mg/L. The detection limit was as low as 5 mg/L，the spiked recovery was between 88.10% and 97.14%，and the analysis time could be controlled within 10 minutes. The detection method was accurate， sensitive and rapid，and could meet the quantitative detection of lauryl alcohol polyoxyethylene ether in complex production liquid. Moreover，due to the mass spectra being used，the structure of laurel alcohol polyoxyethylene ether in oilfield produced water could be analyzed at the same time of concentration detection.

10.19346/j.cnki.1000-4092.2024.03.022