摘要
目的建立超声波辅助提取-气相色谱／质谱法，测定塑料食品包装材料中邻苯二甲酸二（2-乙基己基）酯（DEHP）对玉米的迁移量。方法通过改变样品前处理条件，分析正己烷、甲醇和二氯甲烷等提取溶剂，以及超声提取时间、提取温度和净化方法等因素对提取DEHP的影响，并对实验结果进行优化。结果选用正己烷作为提取溶剂，当提取温度为38℃，提取时间为30min时，可以较好地提取玉米中的DEHP，加标回收率为88．53％-103．28％，检出限为2．54×10mg／kg。结论该方法缩短了前处理时间，精密度较高，为检测玉米中DEHP的含量提供了重要技术手段。
Objective To study the migration of di-2-ethylhexyl phthalate（DEHP） in corn migrated from packaging film. Methods The determination of DEHP in corn migrated from packaging film was studied using GC/MS with ultrasonic assisted extraction method. Specifically, influencing factors upon sample extraction including various extraction solvents （hexane, methanol and dichloromethane）, ultrasonic extraction time, ultrasonic extraction temperature and purification method were investigated. Results The results showed that samples could be extracted well with hexane for 30 min at 38℃. Under the optimal conditions, the recovery rate of the method was between 88.53% and 103.28%, while the LOD was 2.54× 10^-3 mg/kg. Conclusion This method shortened the pretreatment time and improved the precision. It was therefore an effective way for the detection of DEHP in corn.
出处
《包装工程》
CAS
CSCD
北大核心
2014年第11期1-5,共5页
Packaging Engineering
基金
农业部农产品质量安全监管专项
