地沟油的近红外光谱分析鉴别  

Discrimination of waste cooking oil by near infrared spectroscopy

作　　者：谢梦圆[1,2] 张军[1,2] 陈哲[1,2] 李斯本[1,2] 汪勇[3] 欧仕益[3] 马顺[3] 余建辉[1,2] 唐洁媛[1,2] 

机构地区：[1]暨南大学光电工程系,广州510632 [2]广东省高等学校光电信息与传感技术重点实验室(暨南大学),广州510632 [3]暨南大学食品科学与工程系,广州510632

出　　处：《中国油脂》2011年第12期80-83,共4页China Oils and Fats

基　　金：国家自然科学基金(61027010);国家高技术研究发展计划(No.2009AA04Z315);国家2009年质检公益性行业科研专项项目<食用植物油成分真实性鉴定标准研究>;中央高校基金科研业务费专项基金

摘　　要：通过对地沟油和食用植物油近红外吸收光谱的研究,发现光谱经过基于基线校正和一阶导数的预处理后,食用植物油的885 nm光谱强度值与897 nm光谱强度值之比大于1.4,地沟油则小于1.1,利用这个比值差异,可以区分这两类油;在2 430～2 445 nm和2 465～2 485 nm两个波段,食用植物油有明显的峰值,而地沟油则没有峰值。实验表明,近红外光谱可以用于分辨地沟油和食用植物油。The absorbance spectra of edible vegetable oil and waste cooking oil were researched. After pre - treatment of the spectra based on baseline calibration and first -order derivative, the intensity proportion of edible vegetable oil at 885 mn and 897 nm was larger than 1.4, and that of waste cooking oil was smaller than 1.1, which could be used to discriminate the two kinds of oil. Edible vegetable oil had obvious peaks at 2 430 -2 445 nm and 2 465 -2 485 nm, but waste cooking oil did not have. Experiment results showed that near infrared spectroscopy could be used to distinguish between edible vegetable oil and waste cooking oil.

关 键 词：地沟油 食用植物油 近红外光谱 

分 类 号：R155.5[医药卫生—营养与食品卫生学] O657.33[医药卫生—公共卫生与预防医学]