The fresh soybean oils were stored respectively in PET plastic bottle and PE plastic bottle, and the influences of storage temperature, storage time and light on the contents of plasticizers in the soybean oil were investigated. The results showed that the contents of DBP and DEHP in soybean oils packaged in PE plastic bottle were obviously higher than those in PET plastic bottle when the storage temperature was above 27℃ and storage time was 20 d. The contents of DPP in soybean oils had no change when the tem-perature didn’t exceed 50℃, while it rose significantly when the temperature was above 50℃. Further-more, when stored at 65℃ for 90 d, the contents of DPP in the soybean oils packaged in PET and PE plastic bottles were up to 1 559. 3 μg/kg and 2 756. 8 μg/kg, respectively. In addition, when stored at 65℃ for 50 d, DMP could be detected in soybean oil packaged in PE plastic bottle, and its contents were 43. 7(50 d),128. 7(70 d),114. 3 μg/kg(90 d). When stored at 50℃ for 90 d, the content of DBP in soybean oil packaged in PE plastic bottle reached 452. 0μg/kg, 1. 5 times as high as the national standard limit for DBP. Compared with the lucifuge storage, light had no influence on DPP and small im-pacts on DBP and DEHP for a short time. Under the same storage temperature and light condition, as storage time prolonging, the content of DBP in soybean oils packaged in PET and PE plastic bottles were on a rise, and the content of DEHP presented a fluctuation trend.%以新鲜大豆油为原料,将其分别盛装于PET材质塑料瓶和PE材质塑料瓶中,研究不同储存温度、储存时间以及光照对大豆油中邻苯二甲酸酯类塑化剂含量变化的影响。结果表明：储存20 d且储存温度高于27℃时PE瓶装大豆油中DBP和DEHP含量明显高于PET瓶装大豆油的；大豆油中DPP含量在储存温度不超过50℃时基本无变化,但储存温度高于50℃时,其含量明显增加。65℃储存90 d后,PET、PE瓶装大豆油中DPP含量分别高达1559.3、2756.8μg/kg。65℃储存50 d后,PE瓶装大豆油中还检出DMP,含量为43.7(50 d)、128.7(70 d)、114.3μg/kg(90 d)。50℃储存90 d后,PE瓶装大豆油中DBP含量高达452.0μg/kg,是国家标准限量的1.5倍。与避光储存相比,充分光照对大豆油中DPP含量基本无影响,且短期内对DBP及DEHP含量的影响也较小。在相同储存温度及光照条件下,随着储存时间的延长,塑料瓶装大豆油中DBP含量均逐渐升高, DEHP的含量呈波动变化。
展开▼
