ICP-OES法测定两种喉毛花植物中21种矿质元素

Determination of 21 Mineral Elements in Two Species of Comastoma by ICP-OES

本文采用ICP-OES法,测定分析了长梗喉毛花和镰萼喉毛花中的21种矿质元素。所采用方法线性关系良好,r≥0.9990,各元素的检出限均低于0.0036 mg/L,建立了测定喉毛花中多种矿质元素含量的分析方法。结果表明,两种喉毛花中Ca、Mg、Fe三种元素的含量均较高。在检出的人体所需常量和微量元素中,除Se元素外,其他常量、微量元素在长梗喉毛花中含量均高于在镰萼喉毛花中的含量。Pb、As两种重金属元素在镰萼喉毛花中的均含量高于在长梗喉毛花中的含量,Cu则反之。

In this paper,the contents of 21 elements in Comastoma pedunlulatum and C. falcatum were determined by inductively coupled plasma-optical emission spectrometry（ ICP-OES） with microwave digestion. The linear relationship of various elements were good（ r≥0. 9990） and the detection limits of the established method were lower than 0. 0036 mg / L. The recovery rates of the studied elements were in the range of 86%-108% with the relative standard deviations（ RSDs） less than 4. 48%. Therefore,the accuracy and precision of the method were confirmed. The results indicated that detected elements had different concentration orders in C. pedunlulatum and C. falcatum. Ca,Mg and Fe that were essential for human body had high concentrations in two species of Comastoma. The contents of major elements and trace elements（ Ca,Mg,Fe,Zn,Se,Mn,Cr,Cu,V,Ni,Mo） in C. pedunlulatum exceeded those in C. falcatum except for Se.For heavy metals（ Pb,Cu,As）,the contents of Pb,As in C. falcatum were higher than those in C. pedunlulatum while the contents of Cu were opposite. The results provided a scientific basis for the further studies of two species of Comastoma.