摘要
近年来,劣质油流入成品食用油市场引起的地沟油事件,导致了严重的食品安全隐患和社会负面反响.本研究结合可视化和相转移技术,建立了以铜离子和聚二烯丙基二甲基氯化铵(PDDA)修饰的阳离子纳米金为探针的两种简单、准确、灵敏的劣质食用油现场快速检测方法.结果表明,两种方法均可检测到合格食用油中掺入2.8%的劣质油含量,大于5%掺入量可明确测定.将上述方法分别应用于共235个样品的盲测,结果显示,总准确率达95.7%.本工作为劣质食用油的快速现场检测提供了有益的参考方法.
In recent years,illegal cooking oil incident led to the serious food safety risks and the negative social repercussions.In this paper,the copper ions and the cationic gold nanoparticles modified by poly（diallyl dimethylammonium） chloride （PDDA） were used as the recognition probes.Two rapid and convenient colorimetric detection methods of illegal cooking oils based on phase transfer technology were established.The results showed that qualified cooking oil mixed with 2.8% of the illegal cooking oil could be detected,and more than 5% of the illegal cooking oil could be detected accurately by naked-eye.These methods were applied in blind test for total of 235 samples;the results showed that the accurate rates of the blind tests were 95.7%.This work would be helpful for the rapid and on-site detection of illegal cooking oils.
出处
《中国科学：化学》
CAS
CSCD
北大核心
2013年第7期901-910,共10页
SCIENTIA SINICA Chimica
基金
国家自然科学基金(20877099
20972183
21272263)
北京大学天然药物及仿生药物国家重点实验室开放基金(K20120201)
国家十二五计划支撑项目(2012BAI37B03)
中国科学院计算地球动力学重点实验室开放基金课题(006)
中国科学院研究生院课题基金(O8JT011J01)资助
关键词
地沟油
铜离子探针
纳米金
相转移
可视化检测
illegal cooking oil
Cu2＋ probe
gold nanoparticles
phase transfer
colorimetric detection
