期刊
TALANTA
卷 85, 期 2, 页码 1199-1206出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2011.05.048
关键词
Polycyclic aromatic hydrocarbons; High-performance liquid chromatography; Fluorescence detection; Ionic liquids; Ionic liquid micelles; Microwave-assisted extraction
资金
- Spanish Ministry of Innovation and Science (MICINN) [CTQ2008-06253/BQU]
- Canary Agency for Research and Innovation (ACIISI) [ULL APD-08/01]
- National Science Foundation [CHE-0748612]
- [SolSubC20081000171]
A focused-microwave assisted extraction method using aggregates of the ionic liquid (IL) 1-hexadecyl-3-butylimidazolium bromide (HDBIm-Br) followed by high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection and single-channel fluorescence detection (FLD) has been developed for the determination of polycyclic aromatic hydrocarbons (PAHs) in toasted cereals (gofios) of different nature (wheat, barley, rye, and maize corn) from the Canary Islands, Spain. The optimized HPLC-UV-vis/single-channel FLD method takes 40 min for the chromatographic run with limits of detection varying between 0.02 and 4.01 ng mL(-1) for the fluorescent PAHs from the European Union (EU) priority list in foods, and 20.5 ng mL(-1) for the non-fluorescent PAH cyclopenta[c,d]pyrene (CPP). The optimized microwave step presented extractions recoveries ranging from 70.1 to 109% and precision values lower than 12.6% (as relative standard deviation), using an extraction time of 14 min. The extraction method also utilizes low amounts of sample (0.1 g), and low amounts of IL (77 mg), avoiding completely the use of organic solvents. (C) 2011 Elsevier B.V. All rights reserved.
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