| 人为添加非蛋白质氮乳与乳制品中蛋白质含量测定方法的研究 |
| |
| 引用本文： | 陈育红,李宁.人为添加非蛋白质氮乳与乳制品中蛋白质含量测定方法的研究[J].食品安全质量检测技术,2011,2(4):188-192. |
| |
| 作者姓名： | 陈育红 李宁 |
| |
| 作者单位： | 内蒙古自治区产品质量监督检验所国家乳制品及肉类产品质量监督检验中心;内蒙古自治区产品质量监督检验所国家乳制品及肉类产品质量监督检验中心 |
| |
| 摘 要： | 本研究分别用GB/T5009.5《食品中蛋白质的测定》和NY/T1678《乳与乳制品中蛋白质的测定——双缩脲比色法》,测定了添加非蛋白氮物质的乳及乳制品中的蛋白质含量。结果表明GB/T5009.5方法不能区分样品中的蛋白氮与非蛋白氮;采用NY/T1678-2008方法可以较好的实现蛋白氮和非蛋白氮物质的分离,有效地排除三聚氰胺、尿素、甘氨酸和水解蛋白等多种非蛋白氮对乳及乳制品中蛋白质含量检测的影响,该方法前处理方法快速、简单,检测结果准确。 更多还原
|
| 关 键 词： | 乳及乳制品 蛋白质 双缩脲比色法 非蛋白氮 |
Research on the methods of protein determination after added non-protein in milk and dairy products |
| |
| Chen Yuhong and Li Ning.Research on the methods of protein determination after added non-protein in milk and dairy products[J].Food Safety and Quality Detection Technology,2011,2(4):188-192. |
| |
| Authors: | Chen Yuhong and Li Ning |
| |
| Affiliation: | Institute of Products Quality Inspection Inner Mongolia P.R.China,The National Center of Dairy and Meat Products Supervision and Inspection,Hohhot 010070,China;Institute of Products Quality Inspection Inner Mongolia P.R.China,The National Center of Dairy and Meat Products Supervision and Inspection,Hohhot 010070,China |
| |
| Abstract: | The contents of protein were determined using both "GB/T 5009.5 determination of protein in foods" method and "NY/T 1678 determination of protein in milk and dairy products with Biuret spectrophotometry" method,after adding non-protein nitrogen in milk and dairy products.It is shown from the results that GB/T 5009.5 method can not distinguish between protein nitrogen and non-protein nitrogen.Compared with the GB/T 5009.5 method,the NY/T 1678 method can determined the contents of protein accurately after adding melamine and Urea or Proteinum hydrolysatum in milk and dairy products.The method is accurate,simple and rapid. |
| |
| Keywords: | |
|
| 点击此处可从《食品安全质量检测技术》浏览原始摘要信息 |
|
点击此处可从《食品安全质量检测技术》下载全文 |
