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Objective To establish a method for determination of 7 kinds of antioxidant residues, including tert-butylhydroquinone, 2,6-di-tert-butyl-4-methylphenol, butylated hydroxyanisole, butylated hydroxytoluene, 3,5-di-tert-butylphenol, 2,4-di-tert-butylphenol, and 2,6-di-tert-butylphenol, in edible oils by QuEChERS combined with gas chromatography-tandem triple quadrupole mass spectrometry. Methods Edible oil samples were extracted with acetonitrile, and the supernatant was purified using the QuEChERS method, followed by filtration through an organic membrane for direct analysis. Separation was achieved using a HP-5MS chromatographic column, and quantification was performed using the external standard method under electron ionization and multiple reaction monitoring modes. Results The method effectively distinguished the 7 kinds of antioxidants, including their corresponding isomers. The target compounds exhibited good linearity and peak shapes within the range of 1-300 µg/L (r²≥0.99). The limits of detection ranged from 0.11 to 2.77 µg/kg, and the limits of quantification ranged from 0.36 to 9.23 µg/kg. The spiked recovery rates ranged from 72.51% to 116.33%, with relative standard deviations of 0.36% to 5.82% (n=8). Among the actual samples, 2,4-di-tert-butylphenol had a relatively high detection rate. Conclusion This method is simple, accurate, and capable of effectively distinguishing tert-butylphenol antioxidants, making it suitable for high-throughput detection of multiple antioxidants in edible oils.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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