Rapid Magnetic Solid-Phase Extraction Based on Magnetic Multiwalled Carbon Nanotubes for the Determination of Polycyclic Aromatic Hydrocarbons in Edible Oils

In this study, magnetic multiwalled carbon nanotubes were fabricated by a simple method and applied to magnetic solid-phase extraction (MSPE) of eight heavy molecular weight polycyclic aromatic hydrocarbons (PAHs) including chrysene, benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, be...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2011-12, Vol.59 (24), p.12794-12800
Main Authors: Zhao, Qin, Wei, Fang, Luo, Yan-Bo, Ding, Jun, Xiao, Neng, Feng, Yu-Qi
Format: Article
Language:English
Subjects:
anthracenes
Biological and medical sciences
carbon nanotubes
desorption
Fat industries
Food Contamination - analysis
Food industries
Fundamental and applied biological sciences. Psychology
gas chromatography
Magnetic Phenomena
markets
mass spectrometry
molecular weight
Nanotubes, Carbon
oils
Plant Oils - analysis
Polycyclic Aromatic Hydrocarbons - analysis
solid phase extraction
Solid Phase Extraction - methods
washing
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Summary:In this study, magnetic multiwalled carbon nanotubes were fabricated by a simple method and applied to magnetic solid-phase extraction (MSPE) of eight heavy molecular weight polycyclic aromatic hydrocarbons (PAHs) including chrysene, benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3-cd]pyrene, dibenzo[a,h]anthracene and benzo[g,h,i]perylene from edible oil samples. Several parameters affecting the extraction efficiency were investigated, including the type and volume of desorption solvent, extraction and desorption time, washing solution and the amount of sorbent. Under the optimized conditions, a simple and effective method for the determination of PAHs in edible oils was developed by coupling with gas chromatography–mass spectrometry (GC–MS). The whole pretreatment process was rapid, and it can be accomplished within 10 min. The limits of quantitation for the target PAHs were found to be 0.34–2.9 ng/g. The recoveries in oil sample were in the range 87.8–122.3% with the RSDs less than 6.8% (intraday) and 9.6% (interday). This method was successfully applied to the analysis of PAHs in seven kinds of edible oils from local markets.
ISSN:0021-8561
1520-5118
DOI:10.1021/jf203973s