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Objective To establish a method for simultaneously determining the migration amounts of 24 kinds of organophosphate esters (OPEs), organophosphite antioxidants (OPAs), and parabens (PBs) in food contact materials by liquid chromatography-tandem mass spectrometry. Methods The food contact materials to be tested were subjected to migration experiments in accordance with the expected types of food and contact modes, so as to obtain the soaking solution. After centrifugation, the soaking solution was separated by liquid chromatography, determined by tandem mass spectrometry, and quantified by matrix-matched standard curve. Results The optimized method could simultaneously detect 24 kinds of OPEs, OPAs, and PBs in the migration soaking solutions of food contact materials. The limits of detection were 0.01-0.58 µg/L and the limits of quantitation were 0.03-2.00 µg/L. The spiked samples recovery rates ranged from 69.0%-129.6%, with relative standard deviations of 0.5% to 10.9% (n=6). The 20 packaging film bags, 10 disposable take-out boxes and 20 paper tableware items were tested. The ΣOPEs ranges were <limit of detection-19.1 μg/L, ΣOPAs were <limit of detection-1248 μg/L, and ΣPBs were <limit of detection-0.501 μg/L. The monitoring of the migration amounts of food contact materials was limited, its health risks required more attention and research. Conclusion This method is simple to operate and highly sensitive, which is suitable for the determination of the migration amounts of OPEs, OPAs and PBs in food contact material samples.
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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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