冷冻干燥/微波消解/ICP-MS法测定牦牛乳中的微量元素  

Freeze-drying and Microwave Digestion Followed by ICP-MS for the Determination of Trace Elements of Yak Milk

作　　者：张玉玉[1] 唐善虎[2] 徐进勇[1] 马莺[3] 

机构地区：[1]成都理工大学材料与化学工程学院,四川成都610059 [2]西南民族大学生命科学与技术学院,四川成都610041 [3]哈尔滨工业大学食品科学与工程学院,黑龙江哈尔滨150001

出　　处：《食品科学》2009年第18期356-358,共3页Food Science

基　　金：四川省"十一五"科技支撑计划项目(07NG111-002);国家自然科学基金项目(30871953)

摘　　要：采用真空冷冻干燥技术、微波消解方法处理牦牛乳样品后,直接用电感耦合等离子质谱仪(ICP-MS)测定了牦牛乳中的14种微量元素。外标法绘制标准曲线,相对标准偏差1.80%～4.50%,加标回收率95.61%～102.90%。分析结果表明牦牛乳中含有人体中存在的多种微量元素,其干物质中的微量元素含量平均值分别为Cu 0.340μg/g,Zn 50.65μg/g,Fe 16.12μg/g,Mn 0.843μg/g,Mo 0.170μg/g,Co 0.023μg/g,Ni 0.522μg/g,Ti 0.001μg/g,V 0.105μg/g,Li 0.056μg/g,Be 0.003μg/g,Bi 0.029μg/g,Pb 0.305μg/g,Cd 0.014μg/g。Yak milk samples were freeze dried in a vacuum chamber and digested using microwave, and the digestion solution was directly injected into inductively coupled plasma-mass spectrometry （ICP-MS） for quantitative determination of trace elements by external standard method. The relative standard deviations of precision of this method were between 1.80% and 4.50%, and the spiked recoveries ranged from 95.61% to 102.90%. Yak milk contained a variety of trace elements which exist in the human body, and the average contents of the trace elements in yak milk were （calculated on dry matter basis）： Cu 0.340, Zn 50.6, Fe 16.12, Mn 0.843, Mo 0.170, Co 0.023, Ni 0.522, Ti 0.001, V 0.105, Li 0.056, Be 0.003, Bi 0.029, Pb 0.305, and Cd 0.014 μ g/g, respectively.

关 键 词：牦牛乳 微波消解 ICP-MS 冷冻干燥 微量元素 

分 类 号：TS252.1[轻工技术与工程—农产品加工及贮藏工程]