气相色谱法分析牛乳粉中碘成分的定值方法  

Development of a Gas Chromatographic Method for the Determination of Iodine Content in Milk Powder and Homogeneity and Stability Assessment of Iodine Reference Material

作　　者：白晓云 苏运聪 张耀广 李兴佳 李飞 黄亚芳 BAI Xiaoyun;SU Yuncong;ZHANG Yaoguang;LI Xingjia;LI Fei;HUANG Yafang(Key Laboratory of Dairy Quality and Safety Control,Ministry of Agriculture and Rural Affairs,Junlebao Dairy Co.Ltd.,Shijiazhuang 050021,China)

机构地区：[1]君乐宝乳业集团有限公司,农业农村部乳品质量安全控制重点实验室,河北石家庄050021

出　　处：《乳业科学与技术》2023年第1期35-40,共6页JOURNAL OF DAIRY SCIENCE AND TECHNOLOGY

摘　　要：建立一种基于气相色谱法的牛乳粉中碘成分分析基体标准物质定值方法,并将此方法用于该标准物质的均匀性和稳定性检验,对其进行定值。碘在酸性条件下与丁酮反应生成丁酮与碘的衍生物,经气相色谱仪的电子捕获检测器检测,外标法定量。结果表明:该方法线性关系良好(R^(2)=0.9996),加标回收率为95.3%~101.3%,相对标准偏差为2.3%(n=6)。该方法准确度高,可用于牛乳粉中碘含量的标准物质定值。A gas chromatographic method for determining the iodine content in milk powder was established, and the homogeneity and stability of iodine reference material were evaluated. Butanone derivative with iodine produced under acidic conditions was detected by gas chromatography(GC) with an electron capture detector and quantified by an external standard method. The proposed method showed a good linear relationship(R^(2) = 0.999 6), the recoveries from spiled samples were between 95.3% and 101.3%, and the relative standard deviation(RSD) was 2.3%(n = 6). This method had high accuracy and could be used for the determination of the iodine content in milk powder.

关 键 词：气相色谱法 牛乳粉 碘 标准物质 定值 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程]