气相色谱-串联质谱在检测塑料包装食用油中PAHs的应用  

Application of gas chromatography-tandem mass spectrometry in detection of PAHs in plastic packaging edible oil

作　　者：刘发强 夏培蓓 李玉梅 黄蕾 吴咏梅 Liu Faqiang;Xia Peibei;Li Yumei;Huang Lei;Wu Yongmei(Xinjiang Institute of Engineering,College of Chemistry and Environmental Engineering,Urumqi 830091,China)

机构地区：[1]新疆工程学院化学与环境工程学院,新疆维吾尔自治区乌鲁木齐市830091

出　　处：《合成树脂及塑料》2020年第6期27-31,共5页China Synthetic Resin and Plastics

基　　金：国家自然科学基金地区科学基金项目(21667029);新疆工程学院科研育人项目(2019xgy112112);自治区高校科研计划项目(XJEDU2018Y057)。

摘　　要：建立了固相萃取-气相色谱-多重串联质谱测定方法,对塑料包装食用油(精炼豆油)中的多环芳烃进行定性定量测定。结果表明:检测限为0.60~1.93μg/kg,定量限为0.18~0.58μg/kg,相关系数大于0.99665;该检测法对挥发性较强的萘、苊类物质的回收率较低,其余芳烃类物质的回收率均为71.4%~101.2%,相对标准偏差为3.0%~6.4%;150~300℃时,精炼豆油中的轻质多环芳烃受热挥发或分解,温度高于350℃时,发生复杂化合反应重新生成了重质多环芳烃,随着加热时间延长,豆油中形成的多环芳烃总量不断增加。A new solid phase extraction-gas chromatography-multiple tandem mass spectrometry method was established for the qualitative and quantitative determination of polycyclic aromatic hydrocarbons(PAHs)in plastic packaging edible oil(refined soybean oil).The results show that the detection limit is between 0.60 and 1.93μg/kg,the quantitative limit is 0.18-0.58μg/kg,and the correlation coefficient is larger than 0.99665.The recovery of volatile naphthalene and acenaphthene is low,while the recovery of other aromatics are from 71.4%to 101.2%,whose relative deviation range is within 3.0%to 6.4%.The light PAHs in refined soybean oil are volatilized or decomposed by heat at 150~300℃.Heavy PAHs are regenerated and increased by complex reaction when the temperature is above 350℃and with the increase of heating time.

关 键 词：多环芳烃 气相色谱-串联质谱 精炼豆油 

分 类 号：TQ325[化学工程—合成树脂塑料工业]