纸杯中16种多环芳烃在食品模拟液中的浸出量

Determination of the migration of 16 PAHs from paper cups into food stimulants

目的研究纸杯中残留的多环芳烃(PAHs)在不同食品模拟液中的浸出量随时间的变化规律。方法采用水、4%乙酸、20%乙醇溶液、正己烷四种模拟食品的溶剂浸泡一次性纸杯,二氯甲烷液-液萃取,气相色谱-质谱法(GC-MS)测定16种多环芳烃。结果 4种食品模拟液浸泡一次性纸杯后均可检出各种PAHs,且浸出量随浸泡时间的延长而增大,主要的PAHs浸出物以分子量较低的菲、芘、萘、蒽、芴为主,正己烷浸泡出PAHs能力最强。结论应加强对一次性纸杯的监管,使用时切忌长时间浸泡。

Objective To study the variation of the residual polycyclic aromatic hydrocarbons（ PAHs） from disposable paper cups into different food stimulants with time.Methods The disposable paper cups were soaked with water,4% acetic acid,20%ethanol and hexane respectively,and the 16 PAHs were extracted with CH2Cl2,and then determined by gas chromatography-mass spectrometry（ GC-MS）. Results The residual PAHs from disposable paper cups could be leached from the four stimulants,and the amounts increased with the increase of time. The mainly PAHs extracts were phenathrene,pyrene,naphthalene、anthracene and fluorene with lower molecular weight. Largest leaching ability of hexane was observed. Conclusion The supervision of disposable paper cups should be strengthened and it should be avoided using for prolonged immersion.