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| Rapid determination of 16 polycyclic aromatic hydrocarbons in edible vegetable oil by d-SPE/GC-MS with multi-walled carbon nanotubes as adsorbents |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230677 |
| KeyWord:PAHs edible vegetable oil multi-walled carbon nanotubes (MWCNTs) GC-MS |
| FundProject: |
| Author Name | Affiliation | | WANG Siyuan1, HE Tingting2, ZHANG Qin3, SHU Shengyuan1,
FENG Yue2, QI Dongqin2, ZHANG Ping1, WANG Jingjing2 | (1.College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China；
2.Technical Center of Urumqi Customs, Urumqi 830000, China； 3.Technical Center of
Kashgar Customs, Kashgar 844000, Xinjiang, China) |
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| Abstract: |
| To rapidly detect 16 polycyclic aromatic hydrocarbons (PAHs) in edible vegetable oil, the aminated multi-walled carbon nanotubes (NH2-MWCNTs) were used as adsorbents for sample pretreatment, and the dispersion solid phase extraction (d-SPE) with GC-MS method was developed for the simultaneous determination of 16 PAHs in edible vegetable oil samples. The sample pretreatment conditions (the adsorbent dosage, adsorption time, the type and amount of eluent, elution time) were optimized by single factor experiments, and the methodology of the established detection method was investigated and compared with existing methods. Meanwhile, actual samples were detected using the established method. The results showed that the optimal conditions for sample pretreatment were as follows: adsorbent dosage 15 mg (for 1.0 g edible vegetable oil sample), adsorption time 1 min, toluene as the eluent, eluent dosage 500 μL, elution time 5 min. The 16 PAHs showed good linear relationship in the range of 1-200 μg/kg, and the detection limits of the method ranged from 0.05 μg/kg to 0.43 μg/kg, with quantitative limits between 0.17 μg/kg and 1.42 μg/kg. The spiked recovery rate and relative standard deviation were 70.67%-101.83% and 1.34%-9.32%, respectively. Compared to existing pretreament methods, d-SPE is efficient, simple and minimizes the consumption of organic solvents. The content of benzo \[a\] pyrene in 6 commercial edible vegetable oils was less than 2 μg/kg. In summary, the established method is suitable for the determination of 16 PAHs in edible vegetable oil. |
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