基于环形平台支撑离子液体的顶空液相微萃取法检测水样中的多环芳烃

Detection of Polycyclic Aromatic Hydrocarbons in Water Samples by Annular Platform-Supported Ionic Liquid-Based Headspace Liquid-Phase Microextraction.

作者信息

Sun Xiaojie, Tan Jie, Ding Haiyan, Tan Xiaojie, Xing Jun, Xing Lihong, Zhai Yuxiu, Li Zhaoxin

机构信息

Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China.

Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China.

出版信息

J Anal Methods Chem. 2018 Sep 27;2018:3765682. doi: 10.1155/2018/3765682. eCollection 2018.

In this paper, a new method of annular platform-supported headspace liquid-phase microextraction (LPME) was designed using ionic liquid as an extraction solvent, wherein extraction stability and efficiency were improved by adding an annular platform inside the extraction bottle. The ionic liquid 1-silicyl-3-benzylimidazolehexafluorophosphate was first synthesized and proved to be an excellent extraction solvent. Coupled with liquid chromatography, the proposed method was employed to analysis of polycyclic aromatic hydrocarbons (PAHs) in water and optimized in aspects of extraction temperature, extraction solvent volume, extraction time, pH, stirring rate, and salt effect of solution. The results indicated that this method showed good linearity ( > 0.995) within 0.5 g·L to 1000 g·L for PAHs. The method was more suitable for extraction of volatile PAHs, with recoveries from 65.0% to 102% and quantification limits from 0.01 to 0.05 g·L. It has been successfully applied for detection of PAHs in seawater samples.

本文设计了一种以离子液体为萃取溶剂的新型环形平台支撑顶空液相微萃取（LPME）方法，通过在萃取瓶内部添加环形平台提高了萃取稳定性和效率。首先合成了离子液体1-硅烷基-3-苄基咪唑六氟磷酸盐，并证明其为优良的萃取溶剂。该方法与液相色谱联用，用于分析水中的多环芳烃（PAHs），并在萃取温度、萃取溶剂体积、萃取时间、pH值、搅拌速率和溶液盐效应等方面进行了优化。结果表明，该方法对PAHs在0.5 g·L至1000 g·L范围内呈现良好的线性（>0.995）。该方法更适合于挥发性PAHs的萃取，回收率为65.0%至102%，定量限为0.01至0.05 g·L。该方法已成功应用于海水样品中PAHs的检测。