Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1243757 | Talanta | 2016 | 8 Pages |
•Magnetic CN nanosheets were prepared via simple physical blending.•Magnetic CN nanosheets were successfully used in proposed MSPE.•The proposed MSPE was time-saving (within 10 min).•Proposed MSPE may be applied in routine analysis in oil sample.
In this study, we proposed a method to fabricate magnetic carbon nitride (CN) nanosheets by simple physical blending. Low-cost CN nanosheets prepared by urea possessed a highly π-conjugated structure; therefore the obtained composites were employed as magnetic solid-phase extraction (MSPE) sorbent for extraction of polycyclic aromatic hydrocarbons (PAHs) in edible oil samples. Moreover, sample pre-treatment time could be carried out within 10 min. Thus, a simple and cheap method for the analysis of PAHs in edible oil samples was established by coupling magnetic CN nanosheets-based MSPE with gas chromatography-mass spectrometry (GC/MS) analysis. Limits of quantitation (LOQs) for eight PAHs ranged from 0.4 to 0.9 ng/g. The intra- and inter-day relative standard deviations (RSDs) were less than 15.0%. The recoveries of PAHs for spiked soybean oil samples ranged from 91.0% to 124.1%, with RSDs of less than 10.2%. Taken together, the proposed method offers a simple and cost-effective option for the convenient analysis of PAHs in oil samples.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide