Dispersive liquid‐liquid microextraction based on a new hydrophobic deep eutectic solvent for the determination of phenolic compounds in environmental water samples

Dispersive liquid‐liquid microextraction has garnered increasing attention in sample preparation due to its rapid and efficient extraction process. In this study, a new terpineol‐based hydrophobic deep eutectic solvent was firstly synthesized by mixing α‐terpineol with 1‐octanoic acid, and then appl...

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Bibliographic Details
Published in:Journal of separation science 2021-04, Vol.44 (7), p.1510-1520
Main Authors: Hu, Xizhou, Zhang, Luyun, Xia, Hong, Peng, Maoming, Zhou, Youxiang, Xu, Zhimin, Peng, Xitian
Format: Article
Language:English
Subjects:
deep eutectic solvents
Dispersion
dispersive liquid‐liquid microextraction
environmental water samples
Eutectics
Hydrogen bonding
Hydrophobicity
Linearity
Liquid chromatography
Octanoic acid
Optimization
phenolic compounds
Phenols
Solvents
Terpineol
Water sampling
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Summary:Dispersive liquid‐liquid microextraction has garnered increasing attention in sample preparation due to its rapid and efficient extraction process. In this study, a new terpineol‐based hydrophobic deep eutectic solvent was firstly synthesized by mixing α‐terpineol with 1‐octanoic acid, and then applied to analysis of phenols from water samples by dispersive liquid‐liquid microextraction combined with high‐performance liquid chromatography and diode array detection. Infrared spectroscopy indicated that hydrogen bonding was responsible for the formation of deep eutectic solvent between α‐terpineol and 1‐octanoic acid. After optimization of several parameters, such as the type and volume of deep eutectic solvent and the disperser, pH and ionic strength of sample solution, the developed method exhibited excellent extraction performance to the phenols with the enrichment factors from 27 to 32. Good linearity was acquired ranging from 5 to 5000 μg/L, and detection of limits of the proposed method for the phenols ranged from 0.15 to 0.38 μg/L. The recoveries measured by spiked samples at three concentration levels ranged from 81.6 to 99.3%, and precision was found with intra‐ and inter‐day relative standard deviations less than 8.7 and 9.2%, respectively. Finally, the proposed method was successfully applied to the determination of the phenols in environmental water samples.
ISSN:1615-9306
1615-9314
DOI:10.1002/jssc.202001055