羟丙基-β-环糊精修正紫外光谱法-电导率法定量分析表面活性剂复配体系组分
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金“烷基苯磺酸盐激发光谱法定量研究”(项目编号 41202111),中国石油科技创新基金“电氧化联合电絮凝 深度处理胍胶压裂返排液技术研究”(项目编号 2019D-5007-0503),中国石油集团公司西部钻探工程有限公司资助项目 “2023—2024年井下作业公司XZ-WnF压裂流体性能在线监测装置研制”(项目编号2023XZ204)


Quantitative Analysis of Surfactant Complex System by HP-β-CD Modified UV Spectrometry Combined with Conductivity Method
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    辛基酚聚氧乙烯醚(OP-20)与十二烷基硫酸钠(SDS)是油田后期开采中常用的复配表面活性剂。为了准确检测OP-20/SDS 二元复配体系中各组分的含量,以羟丙基-β-环糊精(HP-β-CD)作为掩蔽剂,利用其外亲水、内疏水的特殊结构,以及自发包结芳香族表面活性剂的特性,修正紫外光谱法用于检测二元复配体系中 OP-20 的含量;同时,用电导率法定量分析二元复配体系中的 SDS,研究了 OP-20 对检测结果的影响。结果表明,采用紫外光谱法检测二元复配体系中 OP-20 的含量时,SDS 会对 OP-20 的吸光度和临界胶束浓度(ccmc)产生干扰。在0.2 mmol/L OP-20 水溶液中加入0.4 mmol/L SDS,OP-20 在最大吸收波长224 nm处的吸光度由1.727 增至1.751;在0.4 mmol/L SDS水溶液中,OP-20 的ccmc由纯水中的0.223 mmol/L 降至0.198 mmol/L。HP-β-CD对紫外光谱法检测二元复配体系中的 OP-20 具有显著的掩蔽作用,HP-β-CD 与 OP-20 按物质的量比 1∶1 进行包结,阻断了OP-20 分子和 SDS 分子之间的相互干扰。加入 HP-β-CD 后,二元复配体系中 OP-20 的回收率由 96.42%~106.92%变化至99.28%~101.38%,用紫外光谱法检测复配体系中OP-20含量的准确度明显提高。HP-β-CD消除SDS 和 OP-20 之间相互干扰的原因为 OP-20 分子从宽、窄两个口径方向进入 HP-β-CD 分子空腔并形成包结物。采用电导率法可准确检测二元复配体系中SDS的含量,OP-20 不会对SDS产生干扰。当溶液中OP-20 的浓度为0.1~0.3 mmol/L 时,二元复配体系中 SDS 的回收率为 100.83%~101.92%。HP-β-CD 修正紫外光谱法联合电导率法能有效检测OP-20/SDS表面活性剂二元复配体系中各组分的含量。

    Abstract:

    Octylphenol polyoxyethylene ether (OP-20) and sodium dodecyl sulfate (SDS) are commonly used surfactants in the later stage of oilfield exploitation. In order to accurately detect the content of each component in OP-20/SDS binary complex system, hydroxypropyl-β-cyclodextrin (HP-β-CD) was used as a masking agent to modify the UV spectroscopy and then detect the content of OP-20 in binary complex system by using its special structure of external hydrophilicity and internal hydrophobicity, as well as the characteristics of spontaneous inclusion of aromatic surfactants. At the same time, the conductivity method was used to quantitatively analyze the SDS in binary complex system, and then the effect of OP-20 on the test results was studied. The results showed that SDS could interfere with the absorbance and critical micelle concentration(ccmc)of OP-20 when the content of OP-20 in binary complex system was detected by UV spectroscopy. When 0.4 mmol/L SDS was added to 0.2 mmol/L OP-20 aqueous solution, the absorbance of OP-20 at the maximum absorption wavelength of 224 nm increased from 1.727 to 1.751. In 0.4 mmol/L SDS aqueous solution, the ccmcof OP-20 decreased from 0.223 mmol/L in pure water to 0.198 mmol/L. HP-β-CD had a significant masking effect on the detection of OP-20 in binary complex system by UV spectroscopy. HP-β-CD and OP-20 were encapsulated at a molar ratio of 1∶1, which blocked the mutual interference between OP-20 molecules and SDS molecules. After adding HP-β-CD, the recovery rate of OP-20 in binary complex system changed from 96.42%—106.92% to 99.28%—101.38% . As a result, the accuracy of detecting OP-20 content in complex system by UV spectroscopy was significantly improved. The reason why HP-β-CD eliminated the mutual interference between SDS and OP-20 was that OP-20 molecules entered the HP-β-CD molecular cavity from both wide and narrow aperture directions and then formed an inclusion complex. The conductivity method could accurately detect the content of SDS in binary complex system, while OP-20 would not interfere with SDS. When the concentration of OP-20 in the solution was 0.1—0.3 mmol/L, the recovery rate of SDS in binary complex system was 100.83%—101.92%. HP-β-CD modified UV spectroscopy combined with conductivity method could effectively detect the content of each component in OP-20/SDS binary surfactant system.

    参考文献
    相似文献
    引证文献
引用本文

杨帼君,姜 怡,石东坡,王 渊,孙建萧,朱生华,田明磊,李 赓.羟丙基-β-环糊精修正紫外光谱法-电导率法定量分析表面活性剂复配体系组分[J].油田化学,2024,41(4):718-724.
YANG Guojun, JIANG Yi, SHI Dongpo, WANG Yuan, SUN Jianxiao, ZHU Shenghua, TIAN Minglei, LI Geng. Quantitative Analysis of Surfactant Complex System by HP-β-CD Modified UV Spectrometry Combined with Conductivity Method[J]. OILFIELD CHEMISTRY,2024,41(4):718-724.

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2025-01-12
  • 出版日期:
点击这里给我发消息

点击这里给我发消息