【作者】 董文丽； 孙智慧； 肖玮； 金岭；

【Author】 DONG Wenli,SUN Zhihui,XIAO Wei and JIN Ling Harbin University of Commerce,Harbin,China

【机构】 哈尔滨商业大学轻工学院；

【摘要】 双酚A是制造聚碳酸酯、环氧树脂、酚醛树脂等的重要原料,广泛应用于金属涂层的食品罐头内包装、食品包装材料与饮料容器、餐具、婴儿奶瓶、饮用水桶的生产。它是高脂溶性物质,易通过食品包装容器和塑料薄膜渗入食品或饮料进入体内,引起各类病变,已被各国禁止用于婴儿奶瓶的生产。本文建立了检测聚碳酸酯中残留双酚A的方法,研究了重复使用对双酚A迁移的影响。采用气相色谱-质谱联用技术(GC-MS)定性和定量分析了聚碳酸酯中残留的双酚A。选用市售聚碳酸酯奶瓶作为实验基材,比较不同溶剂、不同提取方法对PC中残留双酚A的提取效果,确定甲醇为溶剂、索氏提取法提取残留双酚A。用外标曲线法测定了双酚A的含量,方法线性相关系数为0.9997,验证了方法的准确性。检测结果双酚A的平均残留量为227.9mg/L。实验同时研究了重复使用对双酚A迁移的影响,结果表明:随着重复使用次数的增加,双酚A的迁移量逐渐减少,从第1次的1.5mg/L逐渐减少至第五次的0.75mg/L。更多还原

【Abstract】 Content of residue bisphenol A from polycarbonate(PC) was measured used the technology of gas chromatography-mass spectrometry(GC-MS).Dichloromethane was used as solvent and methanol was used as precipitating agent.The solution was rotary evaporation after the polymer was filtered.The simple,rapid,sensitive and accurate method of external standard which linear range is 0.05-200.0mg/L,standard addition recoveries is 90.8%-94.2%and RSD is 3.2%-4.5%was used to quantitative analysis.The influence of repeated using to the migration of bisphenol A was also studied in this experiment.The results show that with the reusing times increased,the migration content of bisphenol A was gradually reduced which reduced to 0.75mg/L at the sixth time from 2.4mg/L at the first time.更多还原