气质联用法测定市售白酒中18种邻苯二甲酸酯类塑化剂含量

Determination of 18 Kinds of Phthalate Plasticizers in Commercially-Available Baijiu Products by GC-MS

为了进一步了解市售白酒中邻苯二甲酸酯类塑化剂的污染水平,本文随机抽检了市售的33件白酒样品,采用气质联用法(GC-MS)检测了常见的18种邻苯二甲酸酯类塑化剂的含量。结果表明,邻苯二甲酸二异丁酯(DIBP)、邻苯二甲酸二戊酯(DPP)、邻苯二甲酸二丁酯(DBP)和邻苯二甲酸二(2-乙基)己酯(DEHP)均有不同程度的检出,其检出率分别为30.3%、18.2%、84.8%和45.4%。DBP的检出含量分布在1.00~5.60mg/kg之间,DEHP的含量在2mg/kg左右。本方法中DINP的检出限为9.0mg/kg,其余17种塑化剂的检出限为0.5mg/kg,方法的加标回收率为85.6%~110%。因此,市场上在售的白酒中仍然存在塑化剂的污染风险,可能原因是由于其在生产或储存过程中迁移到白酒中。本研究可为食品中有害因子的风险监测提供参考。

In order to further investigate the pollution levels of phthalate plasticizers in commercially- available Baijiu products, 33 Baijiu samples were collected randomly and the content of 18 common phthalate plasticizers in these samples were detected by GCMS. The results showed that, four phthalate plasticizers, namely DIBP, DPP, DBP and DEHP were detected in all samples with their detection rates of 30.3 %, 18.2 %, 84.8 % and 45.4 % respectively;the detected content of DBP was within 1.00mg/kg and 5.60mg/kg, while the detected content of DEHP was about 2mg/kg;the detection limit of DINP was 9.0mg/kg, and the detection limit of the other 17 phthalate plasticizers was 0.5 mg/kg;the recovery was from 85.6 % to 95.6 %. Therefore, there still existed plasticizer pollution risks in commercially-available Baijiu products, which might be caused in the process of transportation and storage. This study can provide useful reference for the risk monitoring of harmful factors in food.