Cited by 51Analytical chemistry methods developmentSurfactants and Colloidal SystemsIonic liquids properties and applications

Hexafluoroisopropanol/Brij-35 based supramolecular solvent for liquid-phase microextraction of parabens in different matrix samples

Chen, Jia, Deng, Wenwen, Li, Xiao, Wang, Xuanxuan, Xiao, Yuxiu·2019·Journal of Chromatography A

Abstract

A novel supramolecular solvent (SUPRAS) based on hexafluoroisopropanol (HFIP)/Brij-35 was proposed for liquid-phase microextraction (LPME) of parabens in water samples, pharmaceuticals and personal care products. Brij-35 is a cost-effective and non-toxic non-ionic surfactant, but it has a high cloud point (>100 °C). HFIP, with the features of strong hydrogen-bond donor, high density and powerful hydrophobicity, was used as the cloud point-reducing agent and self-assembling and density-regulating solvent of Brij-35. Upon adding HFIP into the Brij-35 aqueous solution, the cloud point of Brij-35 was decreased to below room temperature, and the SUPRAS was formed in the bottom over a wide range of HFIP and Brij-35 concentrations at room temperature. The SUPRAS was composed of Brij-35, HFIP and water, having a density larger than water, and it showed a large spherical structure of positive micellar aggregates (2-8 μm). The HFIP/ Brij-35 SUPRAS-based LPME procedure was non-thermodependent and could be performed at room temperature with centrifugation using normal centrifuge tubes, being very simple. In the extraction of six parabens, the HFIP/ Brij-35 SUPRAS-based LPME method showed short extraction time (3.3 min), low solvent consumption (0.3 mL), and large enrichment factor (26-193). The method of HFIP/ Brij-35 SUPRAS-based LPME with HPLC-DAD gave good linearity for the quantification of parabens with correlation coefficients larger than 0.9990. The limits of detection based on a signal-to-noise ratio of 3 were from 0.042 to 0.167 μg L-1. The recoveries for the spiked real samples were in the range of 90.2-112.4% with relative standard deviation less than 8.9%. Except for tap water, one or several paraben (s) were detected in all the other real samples.

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Crossref · 10.1016/j.chroma.2019.01.030

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Authors
Chen, J., Deng, W., Li, X., Wang, X., & Xiao, Y.
Affiliations
Wuhan University (CN)
Corresponding author
Xiao, Yuxiu
Venue
Journal of Chromatography A
Publisher
Elsevier BV
Published
2019-04
Volume
1591
Pages
33-43
ISSN
0021-9673 (ISSN-L)
OpenAlex
W2910484435
Cited by
51
References
49
Citations by year
2026: 2 · 2025: 2 · 2024: 5 · 2023: 11 · 2022: 4 · 2021: 9 · 2020: 11 · 2019: 7
FWCI
4.34
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Chromatography A (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (81673394, 81373045)
  • Provincial Natural Science Foundation of Hubei of China (2015CFA139)
  • Large-scale Instrument and Equipment Sharing Foundation of Wuhan University (LF20170838)
Topics
  • Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
  • Physical Sciences › Chemistry › Organic Chemistry › Surfactants and Colloidal Systems
  • Physical Sciences › Chemical Engineering › Catalysis › Ionic liquids properties and applications
Keywords
parabens, hexafluoroisopropanol, Brij 35, supramolecular solvents, liquid-phase microextraction, nonionic surfactants, micellar aggregates, pharmaceuticals and personal care products, water samples, preconcentration, HPLC-DAD, surfactant self-assembly, enrichment factor
MeSH terms
Analysis of Variance, Chromatography, High Pressure Liquid, Pharmaceutical Preparations, Hydrocarbons, Fluorinated, Parabens, Polyethylene Glycols, Reference Standards, Solvents, Water, Water Pollutants, Chemical, Reproducibility of Results, Propanols, Phase Transition, Hydrophobic and Hydrophilic Interactions, Liquid Phase Microextraction

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