食品科学 ›› 2009, Vol. 30 ›› Issue (18 ): 356-358.doi: 10.7506/spkx1002-6630-200918083

• 分析检测 • 上一篇    下一篇

冷冻干燥/ 微波消解/ICP-MS 法测定牦牛乳中的微量元素

张玉玉1,唐善虎2,*,徐进勇1,马 莺3   

  1. 1.成都理工大学材料与化学工程学院 2.西南民族大学生命科学与技术学院 3.哈尔滨工业大学食品科学与工程学院
  • 收稿日期:2009-04-12 出版日期:2009-09-15 发布日期:2010-12-29
  • 通讯作者: 唐善虎 E-mail:stang01@126.com
  • 基金资助:

    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)

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

ZHANG Yu-yu1,TANG Shan-hu2,*,XU Jin-yong1,MA Ying3   

  1. 1. College of Materials and Chemical Engineering , Chengdu University of Technology, Chengdu 610059, China;
    2. College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China;
    3. College of Food Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2009-04-12 Online:2009-09-15 Published:2010-12-29
  • Contact: TANG Shan-hu E-mail:stang01@126.com

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。

关键词: 牦牛乳, 微波消解, ICP-MS, 冷冻干燥, 微量元素

Abstract:

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 0.014μg/g, respectively.

Key words: yak milk, microwave digestion, ICP-MS, freeze-drying, trace elements

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