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建立了食品接触材料中正丁醇迁移量的顶空-气相色谱质谱联用测定方法。采用水、4%(体积分数)乙酸水溶液、10%(体积分数)乙醇水溶液、50%(体积分数)乙醇水溶液、95%(体积分数)乙醇水溶液和橄榄油作为食品模拟物,不同类型食品接触材料在不同迁移条件下的进行迁移试验。浸泡液在顶空70℃下平衡40 min后进样,采用INNOWAX毛细管柱进行分离。在优化的条件下,橄榄油模拟液中正丁醇在0.01~0.5mg/kg范围内线性良好,曲线相关系数(r)为0.999 5,检出限为0.01 mg/kg,其他5种模拟液中正丁醇在0.01~0.5mg/L线性良好,r均大于0.999 5,检出限为0.01 mg/L。在3个添加水平下,平均回收率在90%~110%之间。方法简单、快速、灵敏,可满足食品接触材料中正丁醇迁移量的检测需求。
A method for the determination of n-butanol in food-contact materials by headspace-gas chromatography-mass spectrometry was established. Water was used as a food simulant with 4% (volume fraction) aqueous acetic acid solution, 10% ethanol aqueous solution, 50% ethanol aqueous solution, 95% ethanol aqueous solution and olive oil as food simulants. Material migration test under different migration conditions. The soaking solution was equilibrated for 40 min at 70 ° C in the headspace before being injected and separated using an INNOWAX capillary column. Under the optimal conditions, n-butanol in the simulated olive oil liquid had a good linearity in the range of 0.01-0.5 mg / kg with a correlation coefficient (r) of 0.999 5 and a detection limit of 0.01 mg / kg. Among the other five simulated positive solutions Butanol had a good linearity at 0.01-0.5 mg / L, r> 0.999 5, and the detection limit was 0.01 mg / L. The average recoveries ranged from 90% to 110% at the three addition levels. The method is simple, rapid and sensitive and can meet the detection requirements of n-butanol migration in food contact materials.