与塑料包装接触的含水食品中苯系物测定

Determination of Benzene Series from Plastic Packaging Contacting with Foodstuffs

建立顶空-气相色谱法，测定与塑料包装成型品接触的含水食品中，7种有毒有害物质苯系物（苯、甲苯、乙苯、异丙苯、邻-二甲苯、间-二甲苯、对-二甲苯）的迁移。采用3种水性模拟液：蒸馏水、3％（体积分数，后同）乙酸溶液和15％乙醇溶液，采用顶空进样器进样、GC—FID检测。该方法在3种模拟物浸泡液中，回收率为81.1％～121．0％，灵敏度高、定量准确、重现性好。

The migration of benzene series（ benzene, toluene, ethyl benzene, isopropyl benzene, o-xy- lene, m-xylene, p-xylene） from plastic packaging in food stimulants was determined with HS-GC method. The methods adopt three aqueous sirnulant-distilled water, 3% （w/v） acetic acid aqueous solution, andlS% （v/v） ethanol aqueous solution. The rate of recovery was between 81. 1% and 121. 0% . This method has good sensitivity, accuracy and repeatability.