食品科学

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电感耦合等离子体质谱法测定东北山野菜中18 种无机元素

马 微1,2,程 丽3,*,张兰威1,王海波2,魏书娟2,张英春1,焦月华1   

  1. 1.哈尔滨工业大学化学工程与技术博士后流动站,黑龙江 哈尔滨 150001;2.东宁出入境检验检疫局,
    黑龙江 东宁 157200;3.黑龙江大学生命科学学院,黑龙江 哈尔滨 150080
  • 出版日期:2014-09-25 发布日期:2014-09-17
  • 通讯作者: 程 丽
  • 基金资助:

    国家质检总局科技计划基金项目(2013IK155)

Determination of 18 Inorganic Elements in Edible Wild Vegetables from Northeast China by Inductively Coupled Plasma Mass Spectrometry

MA Wei1,2, CHENG Li3,*, ZHANG Lan-wei1, WANG Hai-bo2, WEI Shu-juan2, ZHANG Ying-chun1, JIAO Yue-hua1   

  1. 1. Post-Doctoral Mobile Stations of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China;
    2. Dongning Entry-Exist Inspection and Quarantine Bureau, Dongning 157200, China;
    3. College of Life Sciences, Heilongjiang University, Harbin 150080, China
  • Online:2014-09-25 Published:2014-09-17
  • Contact: CHENG Li

摘要:

建立电感耦合等离子体质谱法同时测定7 种山野菜中Pb、Cd、As、Hg、Cr、Al、Na、Ca、Mg、P、K、Mn、Fe、Ni、Cu、Zn、Sb、Se共18 种无机元素含量的分析方法。样品经微波消解后直接上样分析,采用八极杆碰撞-反应池技术消除了多原子离子质谱干扰,以Sc、Ge、Rh、Bi为内标元素校正了质谱分析中基体效应并补偿了信号漂移。测定质量浓度在0~5 000.0 μg/L范围内,各元素的质量浓度与仪器响应值之间线性关系良好,相关系数均在0.999 5以上;18 种待测元素的检出限为0.51~23.00 ng/g,利用标准参考物质(GBW10015,波菜)验证了分析方法的准确度和精密度,结果表明,标准物质的分析结果与参考值基本一致,本方法可快速、灵敏、准确地测定山野菜中18 种无机元素含量。

关键词: 山野菜, 电感耦合等离子体质谱, 微波消解, 无机元素

Abstract:

An analytical method based on inductively coupled plasma mass spectrometry (ICP-MS) has been developed for
the simultaneous determination of 18 inorganic elements (Pb, Cd, As, Hg, Cr, Al, Na, Ca, Mg, P, K, Mn, Fe, Ni, Cu, Zn, Sb,
and Se) in 7 edible wild vegetables growing in northeast China. After the samples were pretreated by microwave digestion,
octopole collision-reaction system (ORS) was used to eliminate the polyatomic interferences caused by the matrixes. Sc,
Ge, Rh and Bi were used as internal standard elements to compensate matrix effect and signal drift. The concentrations and
responses of each element showed a good linear relationship in the range of 0–5 000.0 μg/L with correlation coefficients
higher than 0.999 5. The detection limits for 18 elements were in the range of 0.51–23.00 ng/g. The accuracy and precision
of this method were confirmed by comparison with reference standard materials (GBW10015, spinach). The results showed
a good agreement between the measured and predicted values for all analytical elements. This method is simple, sensitive
and precise and can be applied for the simultaneous determination of multi-elements in wild vegetables.

Key words: edible wild vegetables, inductively coupled plasma mass spectrometry, microwave digestion, inorganic elements

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