ICP-MS法测定乳制品中碘的含量  

Determination of Iodine in Dairy Products by Inductively Coupled Plasma Mass Spectrometry

作　　者：宁月莲 岳虹 黄晓燕 胡文慧 刘丽君 李翠枝 NING Yue-lian;YUE Hong;HUANG Xiao-yan;HU Wen-hui;LIU Li-jun;LI Cui-zhi(Inner Mongolia Yili Industrial Group Co.Ltd.,Hohhot 010110,China)

机构地区：[1]内蒙古伊利实业集团股份有限公司,内蒙古呼和浩特010110

出　　处：《饮料工业》2022年第2期24-28,共5页Beverage Industry

摘　　要：建立了基于ICP-MS(Inductively Coupled Plasma Mass Spectrometry,ICP-MS)测定乳制品中碘的方法。用5%TMAH做提取剂,在85℃水浴震荡3h,水定容50mL,在4℃、8000r/min条件下离心10 min,滤液在ICP-MS仪器上分析。当碘的添加量在0.1mg/kg~2.0mg/kg时,加标回收率为80.7%~114.6%,相对标准偏差小于10.0%,检出限为0.003mg/kg。该方法具有快速、准确、稳定性好、灵敏度高等优点,可用于乳制品中碘含量的检测。A method for the determination of the content of iodine in dairy products by Inductively Coupled Plasma Mass Spectrometry(ICP-MS) was developed. The samples were extracted with 5% TMAH,shocked in 85℃ water bath for 3 hours,constant volume with water for 50mL,centrifuged at 4℃ at 8000r/min for 10 minutes,the filtrate was analyzed on ICP-MS. Added iodine content was in the range of 0.1mg/kg~2.0mg/kg,the average recoveries were between 80.7% and 114.6%,with RSDs(n=6)less than 10.0%. The limit of quantitation was 0.003mg/kg. The results indicated that this method is accurate,simple and reproducible,and thus suitable for the analysis of the content of iodine in Dairy products.

关 键 词：ICP-MS 碘 TMAH 乳制品 

分 类 号：TS252[轻工技术与工程—农产品加工及贮藏工程]