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奶粉品质鉴定——FTIR光谱法和杜马斯燃烧法联用 被引量:1

Identification of Milk Powder Quality by the FTIR Spectroscopy and the Dumas Combustion Method
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摘要 我国现行国家标准GB 5009.5—2016《食品中蛋白质的测定》中的杜马斯(Dumas)燃烧法是先将样品燃烧测出含氮量,然后根据氮元素与蛋白质换算系数计算蛋白质的含量,如果添加含氮量高的物质,如三聚氰胺,就可以测出较高的"蛋白质含量".采用普通FTIR光谱定性鉴别出奶粉的主要组成成分,然后用杜马斯燃烧法准确测出奶粉中的氮元素和碳元素含量,通过蛋白质换算系数计算出蛋白质含量,可以避免上述由于添加违规化学物质造成测定蛋白质含量虚高的结果;同时通过C/N元素含量比,进一步印证奶粉中的营养成分组成. We use the Dumas combustion method in the current standard of GB 5009.5-2016 by determination ofprotein in food to measure the nitrogen content of the sample first,and then calculate the protein content whichaccording to the conversion coefficient of nitrogen and protein. If those substances with the high nitrogen contentsare added,such as melamine,it can be used to measure the higher protein content. In this paper,the main componentsof the milk powder are identified by the common FTIR spectrum. The contents of nitrogen and carbon in the milkpowder are accurately measured by the Dumas combustion method. The protein content is calculated by the conversioncoefficient of protein. At the same time,the nutrient compositions of milk powder are further confirmed by C/Nelement content ratio.
作者 庄玉伟 褚艳红 郭辉 李晓丽 张国宝 曹健 ZHUANGYuwei1, CHU Yanhong1, GUO Hui1, LI Xiaoli2, ZHANG Guobao1, CAO Jian1(1. High and New Technology Research Center, Henan Acadenly of Sciences, Zhengzhou 450002, China; 2. Zhengzhou Industry Technicians College, Zhengzhou 451150, China)
出处 《河南科学》 2018年第9期1348-1351,共4页 Henan Science
基金 河南省重点科技攻关项目(162102210137) 河南省科学院2018年基本科研费项目资助
关键词 蛋白质含量 杜马斯燃烧法 FTIR 奶粉 protein content Dumas combustion method FTIR milk powder
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