摘要:
为确定两种一枝黄花中微量元素的差异,建立了微波消解-ICP-MS法,测定加拿大一枝黄花与一枝黄花中Ca、Mg、P、Fe、Mn、Ni、Cu、Zn、Se、Cr、Hg和Pb 12种微量元素.方法的加标回收率为95.2%～107.1%,相对标准偏差在2.5%～8.9%之间,检出限在0.002～ 0.057 μg·L~(-1)之间,该方法具有良好的准确度和精密度.分析结果表明,加拿大一枝黄花与一枝黄花均含有Ca、Mg、P、Mn和Fe元素,前者中Ca、Cr、Mn、Zn、Pb、Ni含量较高,而后者中的Mg、P、Fe、Cu、Se 含量较高.
Abstract:
A method for determination of the contents of 12 trace elements in Solidago canadensis and Solidago decurrens was developed by ICP-MS using microwave digestion. The matrix effect and signal drift were compensated by using the internal standard elements(Ge and Bi). The precision of measurement ranges from 2.5% to 8.9% in terms of relative standard deviation. The recoveries and the limits of detection are in the range of 95.2%-107.1% and 0.002-0.057 μg·L~(-1) respectively. It indicated that the proposed method has the advantages of simplicity speediness and sensitivity. The analytical results indicated that there were comparatively rich elements in Solidago canadensis and Solidago decurrens, such as Ca, Mg, Fe, Mn and P, especially the concentration of Ca, Mg and P. In addition, a comparison of the contents of trace elements between Solidago canadensis and Solidago decurrens indicated that Solidago canadensis was rich in the trace elements such as Ca, Cr, Mn, Zn, Pb and Ni, and Solidago decurrens was rich in the trace elements such as Mg, P, Fe, Cu and Se.
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