气相色谱-质谱法快速测定食品接触用塑料中2,2,4-三甲基-1,3-戊二醇双异丁酸酯的特定迁移量  

Rapid Determination of Specific Migration Amount of 2,2,4-Trimethyl-1,3-Pentanediol Diisobutyrate in Plastics for Food Contact by GC-MS

作　　者：周良春 马俊辉 张晓飞 赵文隆 杨婷 雷阳 ZHOU Liangchun;MA Junhui;ZHANG Xiaofei;ZHAO Wenlong;YANG Ting;LEI Yang(Chengdu Institute of Product Quality Inspection and Research Co.,Ltd.,Chengdu 610100,China;National Center for Packaging Material Quality Supervision and Inspection,Chengdu 610100,China)

机构地区：[1]成都产品质量检验研究院有限责任公司,成都610100 [2]国家包装产品质量监督检验中心,成都610100

出　　处：《理化检验（化学分册）》2021年第2期146-151,共6页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用气相色谱-质谱法快速测定从食品接触用塑料中迁移至水、4%(体积分数,下同)乙酸溶液、20%(体积分数,下同)乙醇溶液、50%乙醇溶液、异辛烷和橄榄油等6种食品模拟物中2,2,4-三甲基-1,3-戊二醇双异丁酸酯的含量。在气相色谱分离中采用DB-5MS色谱柱(30m×0.25mm,0.25μm),在质谱分析中采用选择离子监测模式。食品模拟物为水、4%乙酸溶液、20%乙醇溶液和50%乙醇溶液时,萃取溶剂为正己烷,萃取次数为1,萃取时间为10min;食品模拟物为异辛烷时无需萃取;食品模拟物为橄榄油时,萃取溶剂为甲醇,萃取次数为3,萃取时间为10min。TXIB的质量浓度在0.03~1.00mg·L^(-1)(食品模拟物为橄榄油:0.10~2.00mg·kg^(-1))内与其对应的峰面积呈线性关系,检出限(3S/N)为0.01mg·kg^(-1)(食品模拟物为橄榄油:0.03mg·kg^(-1)),测定下限(10S/N)为0.03mg·kg^(-1)(食品模拟物为橄榄油:0.10mg·kg^(-1))。以空白食品模拟物为基体进行加标回收试验,所得回收率为82.7%~110%,测定值的相对标准偏差(n=6)为2.3%~10%。GC-MS was applied to the rapid determination of amount of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate migrated from plastics for food contact into 6food simulant,i.e.water,4%(volume fraction,the same below)acetic acid solution,20%(volume fraction,the same below)ethanol solution,50%ethanol solution,isooctane and olive oil.The DB-5MS chromatographic column(30 m×0.25 mm,0.25μm)was used for GC separation and the selected ion monitoring mode was adopted in MS determination.When food simulants were water,4%acetic acid solution,20%ethanol solution and 50%ethanol solution,extraction solvent was n-hexane,extraction repeat was 1and extraction time was 10 min;when food simulant was isooctane,no extraction was required;when food simulant was olive oil,extraction solvent was methanol,extraction repeat was 3and extraction time was 10min.Linear relationship between values of peak area and mass concentration of TXIB was kept in the range of 0.03-1.00mg·L^(-1)(0.10-2.00mg·kg^(-1)when food simulant was olive oil),with detection limit(3S/N)of 0.01mg·kg-1(0.03mg·kg^(-1)when food simulant was olive oil)and lower limit of determination(10S/N)of 0.03mg·kg^(-1)(0.10mg·kg^(-1)when food simulant was olive oil).On the base of blank food simulants,test for recovery was made by standard addition method;values of recovery found were in the range of 82.7%-110%,with RSDs(n=6)of determined values in the range of 2.3%-10%.

关 键 词：气相色谱-质谱法 特定迁移量 食品接触用塑料 2 2 4-三甲基-1 3-戊二醇双异丁酸酯 食品模拟物 

分 类 号：O657.63[理学—分析化学]