气相色谱-质谱法测定食品模拟物中全氟正丙基乙烯基醚的迁移量

Determination of migration of perfluoro propyl vinyl ether in food simulants by gas chromatography-mass spectrometry

目的建立一种顶空进样-气相色谱-质谱联用法测定各类食品模拟物(酸性、醇类、油性等)中全氟正丙基乙烯基醚的迁移量。方法浸泡液中全氟正丙基乙烯基醚通过顶空进样的方式(顶空瓶中样品在80℃温度下平衡30min)进入气相色谱柱,经过键合苯乙烯-二乙烯基苯多孔高聚物的毛细管柱分离后由质谱检测分析(质荷比69作为定量离子)。结果在优化的色谱柱、顶空平衡时间与温度等仪器条件下,本方法最低检出限达到0.01mg/kg,回收率在86.5%～112.0%之间,相对标准偏差小于10%(n=6)。结论该方法操作简单,灵敏度高,适合测定各类食品模拟物中全氟正丙基乙烯基醚迁移量。

Objective To establish a method for determination of the migration of perfluoro propyl vinyl ether (PPVE)in various food simulants (acidity,alcohols,oils,etc)by headspace sampling-gas chromatography-mass spectrometry.Methods PPVE in soak liquid got into the gas chromatography column by headspace sampling (top empty bottle samples at 80℃ temperature balanced in 30 min).After capillary column separation of bonded styrene-divinyl benzene porous polymer,it was analyzed by mass spectrometry (mass to charge ratio 69 as quantitative ion).Results Under the optimized conditions,the limit of detection reached 0.01mg/kg,the recovery rate ranged from 86.5% to 112.0%,and the relative standard deviation was less than 10%(n=6).Conclusion The proposed method shows a good sensitivity and accuracy,which is suitable for determining migration of PPVE in food simulants.