摘要
选取PET塑料桶及PET塑料桶装大豆油为研究对象,分析了储藏期间PET塑料桶中DEHP向大豆油中迁移的规律,建立了DEHP迁移的数学模型。采用超声波法提取DEHP(55℃、40 min),采用GC-MS法检测DEHP迁移量,PET塑料桶中DEHP检出量为4.594 mg/kg,大豆油中DEHP最大检出量为1.292 mg/kg,最大迁移率为28.12%。以储藏温度(A)和储藏时间(B)为试验因素,大豆油中DEHP迁移检出量为试验指标(Y),进行均匀试验设计及响应面分析,DEHP迁移规律的数学模型为:Y=0.77+0.089A+0.11B-0.013AB+0.039A2+5.072×10-3B2。经响应面分析,大豆油中DEHP的迁移量与储藏温度和储藏时间呈正相关性,随着储藏温度的升高和储藏时间的延长,大豆油中DEHP的迁移量也逐渐升高,储藏温度和储藏时间的交互作用对DEHP的迁移影响显著。
The PET plastic containers and soy oil packaged in PET plastic containers were taken as the objects of this study. The migratory law of DEHP from PET plastic containers into soy oil during storage was studied. The mathematical model of for migration of DEHP was established. DEHP was extracted by ultrasonic extraction under the condition of 55 ℃ in 40 min. The migratory amount of DEHP was detected by GC - MS. The amount of DEHP in PET plastic container was 4.594 mg/kg, while the maximum migratory amount of DEHP in soy oil migrated from PET plastic container was 1. 292 mg/kg. The biggest migratory rate of DEHP was 28.12%. Storage temperature （A） and storage time （B） were taken as experimental factors, and the detected migratory amount of DEHP in soy oil was taken as index of Y by the even experiment design and response surface analysis. The mathematical model of the migratory law of DEHP was ：Y=0.77＋0.089A＋0.11B-0.013AB＋0.039A^2＋5.072×10^-3B^2. The results of response sur- face analysis were showed that the migratory amount of DEHP was in proportion to storage temperature and time. With the increase of storage temperature and the extension of storage time, the migratory amount of DEHP in soy oil increased gradually. The effect of interaction between storage temperature and time on the migration of DEHP was significant.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2013年第5期75-79,共5页
Journal of the Chinese Cereals and Oils Association
基金
河南省重点科技攻关计划(09210211031)
关键词
PET塑料桶
大豆油
DEHP迁移
数学模型
食品安全
PET plastic containers, soya oil, migration of DEHP, mathematical model, food safety
