聚碳酸酯水桶中5种酚类物质的残留量检测以及迁移风险评估

Residue detection and migration risk assessment of 5 kinds of phenolic substances in polycarbonate buckets

目的利用超高效液相色谱法研究聚碳酸酯水桶(polycarbonate,PC)中5种酚类物质(苯酚、双酚A、对叔丁基苯酚、对枯基苯酚和2,4-二叔丁基苯酚)的残留量并对迁移风险进行评估。方法利用溶解-沉淀法对30批PC水桶中的酚类物质进行提取。参考GB 31604.1-2016《食品安全国家标准食品接触材料及制品迁移试验通则》和GB 5009.156-2015《食品安全国家标准食品接触材料及制品迁移试验预处理方法通则》对PC水桶进行迁移试验。利用超高效液相色谱法对提取液和迁移试液中的酚类物质进行定性和定量分析。结果在线性范围0.02~5mg/L内,线性系数均大于0.999,加标回收率在82%~109%之间,相对标准偏差范围为0.6%~5.2%(n=3)。30批饮用水桶中,各酚类物质的检出率分别为73%、93%、50%、43%和93%。食品模拟物为水的迁移实验中,只有苯酚和双酚A有检出,且数值都小于国家标准中的限量值。结论5种酚类物质在PC水桶中的迁移风险都较小,研究可为PC产品的质量控制和酚类物质风险监测提供技术基础。

Objective To study the residual and migration risk of 5 kinds of phenols(phenol,bisphenol A,p-tert-butylphenol,p-cumylphenol and 2,4-di-tert-butyl phenol)in polycarbonate(PC)buckets by ultra performance liquid chromatography(UPLC).Methods Total of 30 batches of PC were extracted by dissolution precipitation method.The migration test for PC bucket was carried out according to GB 31604.1-2016 National food safety standard-General principle for the migration test of food contact materials and their products and GB 5009.156-2015 National food safety standard-General principle to the pretreatment for migration test of materials and articles in contact with food.Qualitative and quantitative analysis of phenols in extract and migration test solution were conducted by ultra high performance liquid chromatography.Results In the linear range of 0.02–5 mg/L,the linear coefficients were all greater than 0.999.The recovery rates and RSDs were 82%–109%and 0.6%–5.2%(n=3).The positive rates of 5 phenols in PC were 73%,93%,50%,43%and 93%,respectively.Only phenol and bisphenol A were detected in the water migration experiment,and all the values were lower than limits in the national standards.Conclusion The migration risk of 5 phenolic substances in PC bucket is relatively small,and this study can provide technical basis for quality control of PC products and risk monitoring of phenolic substances.