摘要
为研究不同泌乳期及产地来源对牛奶中矿物元素含量的影响,并建立产地溯源模型,从我国4个地区(河北、宁夏、陕西和内蒙古)共采集120份牛奶样品,用电感耦合等离子体质谱法测定牛奶中12种矿物元素的含量,研究泌乳期不同阶段牛奶中矿物元素特征的变化并进行产地溯源。结果表明,泌乳期不同阶段样品的矿物元素含量差异不显著(P>0.05),同一泌乳阶段,含量最高的是钾,其次是钙,最低的是铬。除钼外,其余11种矿物元素的含量在4个地区间均存在显著差异(P<0.05)。偏最小二乘判别分析法(PLS-DA)和交叉验证的结果表明,矿物元素可以对不同产地来源的牛奶样品进行分类,交叉验证的准确率为88.3%,通过计算得出产地鉴别的关键因子是锶、铬、锌及锰。综上,多元矿物元素是鉴别牛奶地理来源的有效工具。本研究结果为保障乳制品安全及真实性提供了参考依据。
In order to study the influence of different lactation period and origin on the mineral content in milk,and establish the origin traceability model,a total of 120 milk samples were collected from four provinces of China(Hebei,Ningxia,Shaanxi and Inner Mongolia).The contents of 12 mineral elements in milk were determined by inductively coupled plasma mass spectrometry(ICP-MS).The characteristics of mineral elements in milk at different stages of lactation were studied and the origin of milk was traced.The results showed that there was no significant difference in the contents of mineral elements in lactation samples at different stages(P>0.05).In the same lactation period,the highest content is potassium,followed by calcium,and the lowest content is chromium.Except molybdenum,the contents of the other 11 elements were significantly different among the four regions(P<0.05).The results of partial least squares discriminant analysis(PLS-DA)and cross validation showed that mineral elements could be used to classify milk samples accordng to different origin,and the accuracy of cross validation was 88.3%.The key factors for origin identification were strontium,chromium,zinc and manganese.Therefore,multivariate mineral elements are an effective tool to identify the geographical origin of milk,it will provide a reference for ensuring the safety and authenticity of dairy products.
作者
马宇轩
谢立娜
谭丽芹
梁克红
赵姗姗
郄梦洁
胡翔宇
赵燕
MA Yuxuan;XIE Lina;TAN Liqin;LIANG Kehong;ZHAO Shanshan;QIE Mengjie;HU Xiangyu;ZHAO Yan(Key Laboratory of Agro-product Quality and Safety,Institute of Quality Standard&Testing Technology for Agro-Products,Chinese Academy of Agricultural Sciences,Beijing 100081;College of Food Science and Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018;Liaoning Beipiao Changgao Agricultural Technology Extension Station,Beipiao,Liaoning 122000;Institute of Food and Nutrition Development,Ministry of Agriculture and Rural Affairs,Beijing 100081)
出处
《核农学报》
CAS
CSCD
北大核心
2022年第5期950-956,共7页
Journal of Nuclear Agricultural Sciences
基金
国家自然科学基金资助项目(32072314)。
关键词
牛奶
矿物元素
电感耦合等离子体质谱法
泌乳期
产地溯源
milk
mineral elements
inductively coupled plasma mass spectrometry
lactation period
origin traceability
