期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1436, 期 -, 页码 42-50出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2016.01.067
关键词
Metal-organic frameworks; Magnetic nanoparticles; Dispersive micro solid-phase extraction; Polycyclic aromatic hydrocarbons; Environmental waters; Fruit-tea infusions
资金
- MINECO [MAT2013-43101-R, MAT2014-57465-R]
- Fundacion CajaCanarias [SPDs-AGUA05]
- ULL-International Excellence Campus (CEI)
- FPI PhD research contract [MAT2014-57465-R]
A hybrid material composed by the metal-organic framework (MOF) HKUST-1 and Fe3O4 magnetic nanoparticles (MNPs) has been synthetized in a quite simple manner, characterized, and used in a magnetic-assisted dispersive micro-solid-phase extraction (M-d-mu SPE) method in combination with ultra-high-performance liquid chromatography (UHPLC) and fluorescence detection (FD). The application was devoted to the determination of 8 heavy polycyclic aromatic hydrocarbons (PAHs) in different aqueous samples, specifically tap water, wastewaters, and fruit tea infusion samples. The overall M-d-mu SPE-UHPLC-FD method was optimized and validated. The method is characterized by: its simplicity in both the preparation of the hybrid material (simple mixing) and the magnetic-assisted approach (similar to 10 min extraction time), the use of low sorbent amounts (20 mg of HKUST-1 and 5 mg of Fe3O4 MNPs), and the low organic solvent consumption in the overall M-d-mu SPE-UHPLC-FD method (1.5 mL of acetonitrile in the M-d-mu SPE method and 2.8 mL of acetonitrile in the UHPLC-FD run). The resulting method has high sensitivity, with LODs down to 0.8 ng L-1; adequate intermediate precision, with relative standard deviation values (RSD) always lower than 6.3% (being the range 5.9-9.0% in tap water for a spiked level of 45 ng L-1, 6.1-14% in wastewaters for a spiked level of 45 ngL(-1), and 7.2-17% in fruit tea infusion samples for a spiked level of 45 ngL(-1)); and adequate relative recoveries, with average values of 82% in tap water, and 94% and 75% in wastewater and fruit tea infusion samples, respectively, if using the proper matrix-matched calibration. (C) 2016 Elsevier B.V. All rights reserved.
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