食品接触塑料容器中限用荧光增白剂184和393的迁移行为研究

Study on Migration of the Restricted Fluorescent Whitening Agent 184 and 393 in Food Contact Plastic Container

建立了食品接触塑料容器中限用荧光增白剂184（FWA184）和393（FWA393）迁移量的液相色谱-串联三重四极杆质谱（LC-MS/MS）测定方法.通过实验考察与分析,确定脂类食品模拟物（95％乙醇）为检测方法的浸泡液.研究目标化合物在不同迁移温度（5℃低温冷藏和40℃常温储藏）和时间的迁移规律,拟合迁移曲线方程.结果表明：荧光增白剂184和393在0.03～20 μg/L范围内线性关系良好,相关系数分别为0.999 2和0.999 6,检出限均为0.01 μg/L;添加水平为0.03、0.3和3 μg/L时,加标回收率为91.1％～105.3％,相对标准偏差（n=6）为2.7％～6.4％;2种荧光增白剂在脂类食品模拟物中发生迁移,迁移量随着储存温度的升高和储存时间的延长而增加.该方法灵敏、准确,适用于食品接触塑料容器中FWA184和FWA 393迁移量的测定.

A method of liquid chromatography tandem mass spectrometry （LC-MS/MS） was developed for the detection of migration levels of fluorescent whitening agent （FWA） 184 and 393 in food contact plastic container.Through the experiment investigation and analysis,the fat simulant （95％ alcohol） was confirmed as soaking solution.The migration rule of analytes in two different migration temperatures （low storage condition of 5 ℃ and room storage condition of 40 ℃） and varied migration time were studied by LC-MS/MS,and the corresponding migration equation was established.The results show that the linearity ranges from 0.03μg/L to 20 μg/L with the correlation coefficients of 0.999 2 and 0.999 6 for FWA 184 and FWA 393,respectively,and the detection limits are all 0.01 μg/L.The recoveries range from 91.1％ to 105.3％ and RSD （n=6） range from 2.7％ to 6.4％ at the spiked levels of 0.03,0.3 and 3 μg/L.The migration levels of FWA 184 and FWA 393 are increased with the increase of storage temperature and storage time.The method is sensitive,accurate,and suits for determining the migration of FWA184 and FWA393 in food contact plastic container.