GC-MS法测定食品包装材料印刷油墨中光引发剂二苯甲酮和4-甲基二苯甲酮

建立了气相色谱-质谱(GC-MS)检测食品包装材料表面印刷油墨中光引发剂二苯甲酮(BP)和4-甲基二苯甲酮(MBP)迁移量的方法。样品以正己烷为提取溶剂进行振荡提取和超声波辅助萃取,提取液用GC-MS分析检测。结果表明:该方法线性范围为0.02～0.1mg/mL,检测限为0.004～0.005mg/mL,在0.01,0.02,0.10mg/mL 3个添加水平下,2种光引发剂的平均回收率为88.2%～114.5%,相对标准偏差(n=6)为5.13%～7.95%。该方法简单快速,适用于食品包装材料的日常检测需要。

Determination of Benzophenone and 4-methylbenzophenone Photoinitia-tors in Printing Inks for Food Packaging Material by Gas Chromatography-mass Spectrometry

An analytical method based on gas chromatography-mass spectrometry(GC-MS) tech-niques was developed for determination of benzophenone and 4-methylbenzophenone photoini-tiators in printing inks used for food packaging materials.The test samples were extracted from selected food packaging materials using oscillating extraction and ultrasonic assisted extraction with n-Hexane as the extraction solvent,and the extracts was analyzed by GC-MS.The results showed that the linearity range of the method is 0.02~0.1 mg/mL and the limits of detection for benzophenone and 4-methylbenzophenone are 0.004 mg/mL and 0.005 mg/mL;the average re-coveries of the three adding levels(0.01,0.02,0.10 mg/mL) are 88.2%~114.5%,with the relative standard deviations(n=6)of 5.13%~7.95%.It was concluded that the method is simple and rapid,which is applicable for routine determination of food packaging materials.