乳制品及特殊膳食中添加及非法添加检测方案

鲜奶中硫氰酸根的检测-――离子色谱法结合英蓝渗析技术 李涛*，孙焕，陶玲 瑞士万通中国有限公司中心实验室，北京， 100005 Bj.lit@metrohm. com. cn 本文建立了基于离子色谱法搭配英蓝渗析技术的针对鲜奶当中的硫氰酸盐的定量分析方法。样品经纯水溶解、超声提取和离心三步简单前处理后，所得到的上清液直接进入英蓝渗析模块进行处理，处理完成后进行离子色谱分析。通过条件优化，最终建立的分析方法显示了良好的线性关系， SCN-检出限为 0.023mg/L，加标回收率在 92%~106%之间，方法精密度为 2.8%。该方法具有简单、高效、灵敏的多方面优点，可以用于快速检测奶制品中微量硫氰酸盐的含量。 Determination of thiocyanate in milk using In-line Dialysis-Ion Chromatography Tao Li*， Huan Sun， Ling Tao Cclab of Metrohm Chian， Beijing， 10085Bj.lit@metrohm.com.cn Thiocyanate in milk has been analyzed by ion chromatography coupled with in-line dialysis.The sample was extracted by mixing， ultransonication and centrifuge. The supernatant liquid wasthen induced to in-line dialysis module for sample preparation. After that， the sample wasanalyzed by ion chromatography. The optimized method showed a good linearity of thiocyanate.The LOD of SCN- was 0.023mg/L. The average recoveries were in the range of 92%~106%. Andthe precision was 2.8%. The build method was simple， efficient and sensitive and could be usedto determinate the concentration of thiocyanate in milk.