食品科学

• 分析检测 • 上一篇    下一篇

美洲山核桃中微量元素的组成

刘宏伟,秦宗会,谢华林   

  1. 1.湖南工学院材料与化学工程学院,湖南 衡阳 421002;2.长江师范学院化学化工学院,重庆 408100
  • 出版日期:2013-07-25 发布日期:2013-08-02

Compositions of Inorganic Trace Elements in Pecans

LIU Hong-wei,QIN Zong-hui,XIE Hua-lin   

  1. 1. College of Material and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China;
    2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
  • Online:2013-07-25 Published:2013-08-02

摘要:

建立美洲山核桃中微量元素的分析方法。采用硝酸-双氧水(3:2,V/V)的混合溶剂作为消解液微波消解美洲山核桃样品,电感耦合等离子体发射光谱法测定美洲山核桃中B、Na、Mg、Al、Si、P、S、K、Ca、Fe10个元素,电感耦合等离子体质谱法测定美洲山核桃Li、Ti、V、Cr、Mn、Co、Ni、Cu、Zn、As、Rb、Sr、Mo、Cd、Sn、Sb、Ba、Pb 18个元素。采用GBW10013黄豆作为标准物质验证了方法的准确性。结果表明,测定结果与标准物质所提供的参考值一致,所有待测元素的检出限为0.004~17.02μg/L,美洲山核桃中营养元素Ca、Mg、P、K、S的含量较高。此方法准确性高,精密度好,完全可以满足美洲山核桃中无机微量元素组成的分析要求。

关键词: 美洲山核桃, ICP-OES, ICP-MS, 无机微量元素

Abstract:

This paper describes a simple method for the determination of trace elements in pecans by using inductively
coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma spectrometry (ICP-MS).
HNO3 and H2O2 (V/V = 3:2) were used to achieve the complete decomposition of the organic matrix in a closed-vessel
microwave oven. The contents of 10 trace elements (B, Na, Mg, Al, Si, P, S, K, Ca and Fe) in pecans were determined
by ICP-OES while 18 trace elements (Li, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, As, Rb, Sr, Mo, Cd, Sn, Sb, Ba and Pb) were
determined by ICP-MS. The soybean reference material (GBW10013) was used as the standard reference material. The
results revealed a good agreement between the measured and predicted values for all the analytes. The detection limits
of the 28 elements were in the range of 0.004 to 17.02 μg/L. The concentrations of essential microelements such as Ca,
Mg, P, K and S were higher. The method is highly accurate and precise and can meet the requirements for analysis of the
inorganic elements in pecan samples.

Key words: pecans, ICP-OES, ICP-MS, inorganic trace elements