GC–MS法快速测定食品接触材料油墨中16种多环芳烃

Determination of 16 Kinds of PAHs in Ink for Food Contact Materials by GC–MS

以正己烷超声提取,弗罗里硅土固相萃取柱净化,以正己烷–二氯甲烷溶液(体积比1∶1)洗脱,用GC–MS联用仪SIM模式外标法定量测定食品接触材料油墨中16种多环芳烃。在优化条件下,16种多环芳烃的浓度在0.1～4.0μg/mL范围内与色谱峰面积呈良好的线性关系,线性相关系数大于0.995,检出限为0.12～3.24 ng/L。加标回收率为77.24%～104.76%,测定结果的相对标准偏差为1.05%～1.69%(n=6)。该方法适用于食品接触材料油墨中PAHs的日常检测。

A method for determination polycyclic aromatic hydrocarbon （PAHs） in ink for food contact materials by gas chromatography-mass spectrometry （GC-MS） was established. The samples were extracted ultrasonically with hexane, and cleaned up by the Florisil solid phase extraction column, and then washed with hexane-dichloromethane（volum ratio was 1 ： 1）. The PAHs were analyzed by GC-MS under selected ion monitor （SIM） mode and quantified by the external standard method. Under the optimal conditions, good linearities were obtained in the range of 0.1-4. 0 μ g/mL for sixteen analyzed compounds with correlation coefficients more than 0. 995. The detection limits ranged from 0.12 to 3.24 ng/L. The average recoveries of 16 PAHs were 79.74%-101.26%, and the RSD was 1.05%-1.69% （ n=6 ）. The method can be used for the routine analysis of PAHs in ink for food contact materials.