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Determination of Hydrophilic UV Filters in Real Matrices Using New-Generation Bar Adsorptive Microextraction Devices

Centro de Química e Bioquímica e Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
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Separations 2019, 6(4), 45; https://doi.org/10.3390/separations6040045
Received: 29 May 2019 / Revised: 7 August 2019 / Accepted: 19 August 2019 / Published: 25 September 2019
(This article belongs to the Special Issue Development of Alternative Green Sample Preparation Techniques)
In the present contribution, new-generation bar adsorptive microextraction devices combined with microliquid desorption, followed by high-performance liquid chromatography–diode array detection (BAµE-µLD/HPLC–DAD) are proposed for the determination of two very polar ultraviolet (UV) filters (2-phenylbenzimidazole-5-sulfonic acid (PBS) and 5-benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid (BZ4)) in aqueous media. Different sorbents were evaluated as BAµE coating phases, in which polystyrene–divinylbenzene polymer showed the best selectivity for the analysis of both UV filters, with average extraction efficiency of 61.8 ± 9.1% for PBS and 69.5 ± 4.8% for BZ4. The validated method showed great reproducibility for the analysis of PBS and BZ4 UV filters, providing suitable limits of detection (0.04 µg L−1 and 0.20 µg L−1), as well as good linear dynamic ranges (0.16–16.0 and 0.8–80.0 µg L−1), respectively. The proposed methodology was applied for monitoring the target analytes in several real matrices, including tap, sea, and estuarine waters, as well as wastewater samples. Despite some matrix effects being observed for some real samples, good selectivity and linearity were obtained. The present contribution showed an innovative analytical cycle that includes the use of disposable devices, which make BAµE much more user-friendly and suitable for the routine work, being a remarkable analytical alternative for trace analysis of priority compounds in real matrices. View Full-Text
Keywords: bar adsorptive microextraction; floating sampling technology; high-performance liquid chromatography; polar UV filters; real matrices bar adsorptive microextraction; floating sampling technology; high-performance liquid chromatography; polar UV filters; real matrices
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Ide, A.H.; Nogueira, J.M.F. Determination of Hydrophilic UV Filters in Real Matrices Using New-Generation Bar Adsorptive Microextraction Devices. Separations 2019, 6, 45.

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