【摘要】 采用气相色谱-质谱联用法测定塑料食品包装材料中非邻苯二甲酸酯类增塑剂环己烷-1,2-二甲酸二异壬基酯(DINCH)的迁移量。分别用水、3%乙酸溶液和15%乙醇溶液模拟水性食品,异辛烷模拟脂肪食品,水性食品模拟液浸泡样品后用正己烷进行萃取,脂肪食品模拟液浸泡样品后采用氮气吹干后正己烷定容直接进样。结果表明:该方法线性范围为10~400?g/mL,r=0.9999,在4种模拟物浸泡液中,DINCH的回收率为95.2%~103.4%,相对标准偏差均小于5%。该方法定量准确、重复性好,可用于塑料食品包装材料中DINCH迁移量的评价。更多还原

【Abstract】 The migration of non-phthalate plasticizer, di(isononyl) cyclohexane-1,2-dicarboxylate(DINCH) in plastic food packaging materials was evaluated by GC-MS. Distilled water, 3%(V/V) acetic acid aqueous solution and 15%(V/V) ethanol a queous solution were used as aqueous food stimulants and isooctane as a fatty food stimulant. The aqueous food stimulants were extracted with n-hexane after food packaging materials were immersed in each of them. After being used to immerse samples, the fatty food stimulant was blown to dryness by nitrogen and then re-dissolved and diltetedin n-hexane direct injection. The results showed that the linear range was between 10 μg/mL and 400 μg/mL(r = 0.9999), and the recoveries of DINCH ranged from 95.2% to 103.4% with relative standard deviation(RSD) of less than 5% in four stimulants. The developed method is accurate and repeatable. It can be used for the evaluation of DINCH migration in p lastic food packaging materials.更多还原