Preparation of beta-cyclodextrin based nanocomposite for magnetic solid-phase extraction of organic ultraviolet filters.

J Chromatogr A

State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China. Electronic address:

Published: January 2022

A simple and efficient analytical method for organic UV filters (UV-Fs) in environmental samples has been established in this study. Taking advantage of the hydrophobicity on the inner cavity, hydrophilicity on the outer wall, and host-guest interaction provided by beta-cyclodextrin, a core-shell magnetic extraction material was firstly synthesized by using a facile method. The extractant was utilized in magnetic solid-phase extraction of UV-Fs in complex environmental samples, including beach sand, sediment and river water samples, followed by the quantitation using high-performance liquid chromatography. A series of factors affecting extraction efficiencies of seven UV-Fs were profoundly optimized. Under the optimal conditions, the linear ranges were at 5.0-5.0 × 10 ng mL for the UV-Fs with regression coefficients (r) at 0.9984-0.9998. The limits of detection were from 0.12 to 1.4 ng mL. The recoveries were in the range of 84.2-109%. Furthermore, the molecular dynamics simulations and independent gradient model analysis were applied to reveal the adsorption configuration and interaction mechanisms between target analytes and the sorbent.

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http://dx.doi.org/10.1016/j.chroma.2021.462765DOI Listing

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