中文摘要：

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。

英文摘要：

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.