Full
Outline
To establish a method for the simultaneous determination of migration levels of 10 kinds of restricted substances [including bisphenol A, bisphenol S, bisphenol F, phthalic acid, terephthalic acid, isophthalic acid, trimellitic acid, caprolactam, 1,1’-sulfonylbis(4-chlorobenzene) and 4,4’-biphenol] in food plastic packaging products by high performance liquid chromatography.
Following the general principles of migration tests, plastic packaging products were subjected to migration testing using food simulants, the food simulants were separated by gradient elution with a mobile phase of 0.1% phosphoric acid aqueous solution-methanol on a Welch Ultimate AQ-C18 chromatographic column (3.0 mm×100 mm, 3.5 μm), detected by a diode array detector, and quantified by the external standard method.
All 10 kinds of compounds exhibited good linear relationships in the concentration range of 0.10 to 10.00 mg/L (r2>0.999) in various food simulants, including 4% (volume fraction) acetic acid, 10% (volume fraction) ethanol, 50% (volume fraction) ethanol and 95% (volume fraction)ethanol. The limits of detection were in the range of 0.01–0.02 mg/L and the limits of quantitation were 0.05 mg/L.At 3 spiked concentration levels (low, medium and high), the recoveries of the target analytes in different food simulants ranged from 87.8% to 104.0%, with relative standard deviations (n=6) ranging from 0.33% to 7.58%.
This method is simple, efficient and accurate and is suitable for the determination of migration levels of 10 kinds of restricted substances in food plastic packaging 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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