食品接触材料中正丁醇迁移量的测定

Determination of n-Butanol Migration Quantity in Food Contact Materials

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 headspace-gas chromatography mass spectrometry method for the determination of n-butanol migration quantity in food contact materials was established. Water, 4%（v/v） aqueous acetic acid solution, 10%（v/v） aqueous ethanol solution, 50%（v/v） aqueous ethanol solution, 95%（v/v） ethanol solution and olive oil were chosen as food simulated solution. Migration experiments for different types of food contact materials were carried out under different migration conditions. The test sample was injected after balance in headspace at 70 ℃for 40 min. a INNOWAX capillary column was used for separation. Under optimized conditions, n-butanol in olive oil showed good linearity in the range of 0.01 - 0.5 mg/kg, curve correlation coefficient（r） was 0.99 95, method detection limit was 0.01 mg/kg, n-butanol in the other five simulated solutions also showed good linearity in the range of 0.01 - 0.5 mg/L, and the curve correlation coefficient（r） was more than 0.9995. At three addition levels, the average recovery was between 90% and 110%. The method is simple, rapid and sensitive, and can meet the requirement of determining n-butanol migration quantity in food contact materials.