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Objective To establish an analytical method for the simultaneous determination of 8 kinds of organophosphate ester flame retardants of major meat and cereal food products by QuEChERS purification technology coupled with ultra performance liquid chromatography-tandem mass spectrometry. Methods Separation was achieved on a Agilent EC-C18 column (3 mm×150 mm, 2.7 μm) with a mobile phase consisting of 0.1% formic acid aqueous solution and acetonitrile under gradient elution at a flow rate of 0.4 mL/min. Detection was performed in positive electrospray ionization (ESI+) mode with multiple reaction monitoring (MRM). Results The 8 kinds of organophosphate ester flame retardants exhibited good separation and showed excellent linearity in the range of 1.0-50.0 ng/mL, with correlation coefficients all greater than 0.99. The limits of detection and limits of quantitation were 1.0 μg/kg and 2.0 μg/kg, respectively. The recoveries of this method were 70.0%-119.6%, and the relative standard deviations were 0.2%-12.7%. Conclusion The established method is simple, rapid and highly efficient in extraction, and has been successfully applied to the analysis of organophosphate ester flame retardants in food samples (including cereals and meat products).
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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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