基于激光粒度仪的回收油脂鉴别研究.pdf

第6卷第9期
食品安全质量检测学报
Vol 6 No 9
2015年9月
Journal of Food Salcly and Quality
15
基于激光粒度仪的回收油脂鉴别研究
李琴梅!,刘晓榖,朱雨薇,刘伟丽
(1.北京市理化分析测试中心,北京市食品安全分析測试エ程技术研究中心,有机材料检测技术与质量评价北京市重点实
验室、北京1000c2.北京市海淀区产品质量监督检验所.国家食品质量安全监督检验中心,北京100094)
摘要:目的开发一种能对回收油脂进行有效鉴别的简便、快捷新方法。方法采用马尔文激光粒度仪对
27种未经使用食用油以及5种回收油脂中颗粒物粒度大小进行测定并对址此32种油中颗粒物的粒度大小及其
分布范围进行比较。结果未经使用的27种食用油中颗粒物粒度平均峰值均小于10nm、而5种回收油脂中
颗粒物粒度平均峰值均大于300nm。结论回收油脂中颗粒物粒度要大于食用油的颗粒物粒度,通过2类油
脂中颗粒物粒度峰值的差异可以进行回收油脂鉴别。本文采用激光粒度仪鉴别回收油脂、无需对样品进行任何
前处理,测试过程简便、快捷。
关键词:激光粒度仪;回收油脂:粒度
Research of identification of waste oill based on Zetasizer
LI Qin-mei, LIU Xiao-yi, ZHU Yu-wei, LIU Wei-li
(1. Beijing Key aboratory of Organic Matevials esting echnology uality Valuation, Beijing Fngineering Research
Center of Food Safety Analysis, Beiing Centre for Physica/& Chemicalanalysis, Beijing 100094, China; 2. China Nationa
Food Safely, Super-vision cmd Inspeclion Center, Beijing 100094, China)
ABSTRACT: Objective lo develop a new method Ior identification of waste oil by Zetasizer Methods
Marvel Zetasizer was expl
elored to measure the mean diameter of the particles in 27 kinds of edible oil and 5 kinds
of waste oil, and the particlc size and the distribution of edible oil and waste oil were comparcd. Results It was
tound out that the mcan diameter of edible oil was smallcr than 10 nm, the particle size of waste oll was larcr
than 300 nm. Conclusion The results show that the mean diameter o] waste oil is much larger than that of edible
oil. According to diference o! particle size of 2 kinds of oils, waste oil and edible oil could be distinguished by
Zetasizer. This method of' identifying waste oil by Zetasizer was non-prelrealment, rapid and convenient
KEY WORDS: Zetasizer, waste oil, particle size
脂、泔水油、多次反复加热使用及从餐饮企业下水
道收集的垃圾油的总称,主要包括4大类:地沟油
近年来。随着人们生活水平的提高食品安全(狭义小泔水油(潲水油)煎炸老油和废弃动物油脂
问题越来越受到人们的重视。而回收油脂事件的曝光,回收油脂中重金属、过氧化值和酸价均可能超标,
如屠宰场原料変回收油脂原料等,使得回收油脂成若被食用可能危害身体健康2。目前,一些不法商人
为社会輿论和媒体的焦点。回收油脂是废弃动物油在利益驱动下,将劣质回收油脂冒充食用油销售,
通讯作者:刘伟丽,博士,副研究员,主要研究方向为材料分析与检测。F-mail: liuweiliiaiccas. ac.cn
Corresponding author LIU Wci-li, Ph. D, Associatc Rcscarchcr. Bcijing Centre for Physical &Chcmical Analysis. Fuhua Building B, 7
Fengxian Middle Road, Haidian District, Beijing 100094, China. E-mail: liuwcili(Ciiccas ac cn