期刊
TALANTA
卷 132, 期 -, 页码 433-442出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.09.044
关键词
Polycyclic aromatic hydrocarbons; Silicone sorbents; Sorptive extraction; Ultra-high performance liquid chromatography; Water analysis
资金
- Spanish Ministry of Economy and Competitiveness
- E.U. FEDER funds [CTQ2012-33080]
A new straightforward and inexpensive sample screening method for both EPA and EU priority polycyclic aromatic hydrocarbons (PAHs) in water has been developed. The method is based on combined direct immersion and headspace (DIHS) sorptive extraction, using low-cost disposable material, coupled to ultraperformance liquid chromatography with fluorescence and UV detection (UPLC-FD-UV). Extraction parameters, such as the sampling mode, extraction time and ionic strength were investigated in detail and optimized. Under optimized conditions, water samples (16 mL) were concentrated in silicone disks by headspace (HS) and direct immersion (DI) modes simultaneously, at room temperature for 9 h for the majority of the 24 studied compounds. Ultrasound-assisted desorption of extracted analytes in acetonitrile was carried out also at room temperature. The optimized chromatographic method provided a good linearity (R >= 0.9991) and a broad linear range for all studied PAHs. The proposed analytical procedure exhibited a good precision level with relative standard deviations below 15% for all analytes. Quantification limits between 0.7 and 2.3 mu g L-1 and 0.16 and 3.90 ng L-1 were obtained for compounds analyzed by UV (acenaphtylene, cyclopenta[c,d]pyrene and benzo[j]fluoranthene) and fluorescence, respectively. Finally, the proposed method was applied to the determination of PAHs in different real tap, river and wastewater samples. (C) 2014 Elsevier B.V. All rights reserved.
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