十二种花类药材中八种微量元素的含量测定及比较研究

Comparative Study on Eight Trace Elements in Twelve Flower Medicines

选取藏药中极为常见的12种花类药材葛花、千日红、菊花、桃花、美人蕉、雪梨花、月季、鸡冠花、槐花、雪莲、马蔺花和秦艽花，利用空气-乙炔火焰原子吸收光谱法测定其Ca，Cu，Fe，Mn，Zn，K，Mg和Na八种微量元素的含量。通过对这些花类药材中微量元素含量的测定，观察不同药材中微量元素的含量差别。该方法的加标回收率在96.76%～102.93%之间，RSD值在1.13%～3.46%之间，具有较好的准确度和精密度。研究结果表明这12种花类药材中微量元素含量丰富，且K，Mg，Na的含量普遍较高。不同药材中各元素的含量均有差异，含微量元素较丰富的是雪莲、马蔺花、美人蕉、鸡冠花;含量较少的是槐花和秦艽花。本试验为这些花类药材的合理药用及进一步的开发利用提供了可靠依据。

Eight trace elements such as Ca, Cu, Fe, Mn, Zn, K, Mg and Na in twelve kinds of flower medicines were determined by flame-atomic absorption spectrometry with air-acetylene flame. The flower medicines include Pueraria lobata Ohwi. , Gomphrena globosa L. , Chrysanthemum mori folium Ramat. , Prunus persica （L.） Batsch. , Canna indica L. , Pyrus bretschneideri Rehd P. spp, Rosa chinensis Jacq. , Celosia cristata L. , Sophora japonica L. , Saussurea medusa Maxim. , Iris lactea var. chinensis （Fisch.） koidz, and Gentiana straminea Maxim.. All of the flowers were commonly used in Tibetan medicines. Three kinds of the flowers were bought in the market and the others were picked in Qinghai province. These flower medicines were selected, dried and powdered, 4. 000g was weighed accurately with analytical balance, and five portions were used for each kind of sample. The content of eight trace elements in these flower medicines was determined and the difference in the con- tent was observed. The recovery rate obtained by the standard addition method was between 96. 76% and 102. 93%, and the RSD was between 1.13% and 3.46%, so the accuracy of the method was better and the precision of the method was good. The results of the experiment indicated that the contents of the eight trace elements were rich in the twelve kinds of flower medicines, and the content of three trace elements including K, Mg, Na were more than other trace elements in the twelve flower medicines. There were considerable differences in the content of the eight trace elements in different flower medicines and there were more trace elements in Saussure medusa Maxim. , Iris lactea vat. chinensis （Fisch. ） koidz. , Canna indica L. and Celosia cristata L. and less trace elements in Sophora japonica L. and Gentiana straminea Maxim.. The data of the experiment could provide an accurate and credible evidence for the reasonable medicinal use and deeper exploitation of these flower medicines.