婴幼儿配方乳粉中微量碘测定方法的比较  

Comparison of detemination methods of trace Iodine in infant formula powder

作　　者：单艺[1] 马微[2,3] 刘晓玲[4] 王象欣[1] 夏行昊[1] 于力涛[1] 魏雪冬[1] 姜毓君[1] 

机构地区：[1]东北农业大学国家乳业工程技术研究中心黑龙江省乳品工业技术开发中心,黑龙江哈尔滨150028 [2]哈尔滨工业大学,黑龙江哈尔滨150001 [3]东宁出入境检验检疫局,黑龙江牡丹江157200 [4]黑龙江省质量监督检测研究院,黑龙江哈尔滨150050

出　　处：《食品工业科技》2015年第7期281-285,共5页Science and Technology of Food Industry

基　　金：国家科技支撑计划课题(2012BAK17B04)

摘　　要：本文采用气相色谱法（GC）、电感耦合等离子体质谱法（ICP-MS）、离子色谱法（IC）分别测定了婴幼儿配方乳粉中碘的含量。通过多方面因素对比：前处理的方式、碘的测定种类、方法线性范围、回收率、检出限、精密度等,得出电感耦合等离子体质谱法前处理操作简便,受奶粉复杂基质干扰最小,在1~50μg/L线性范围内,相关系数可达到0.999以上。回收率在95.9%~103.7%之间,RSD为0.6%~2.2%,检出限为0.6μg/100g,最适合用于婴幼儿配方乳粉中微量碘的实验室常规分析。Gas chromatography （ GC）, inductively coupled plasma - mass spectrometry （ ICP - MS） and ion chromatography（IC） were used to determine iodine in infant formula powder. Comparing various factors.. pretreatment method,iodine types, linear range and recovery, detection limit, precision, etc.Pretreatment of ICP- MS method was simple,the interference of complex matrix was minimum,the linear range between 1g/L to 50μg/ L,correlation coefficient could reach more than 0.999, recovery rate was between 95.9% -103.7%, RSD was 0.6% 2.2% ,the detection limit was 0.6μg/100g.ln conclusion,coupled plasma mass spectrometry was more suitable for iodine determination of infant formula milk powder in laboratory routine analysis.

关 键 词：碘 气相色谱法 电感耦合等离子体质谱法 离子色谱法 婴幼儿配方乳粉 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程]