金银花中6种金属元素的形态分析

对金银花中Mn,Fe,Cu,Zn,Ca和Mg6种金属元素的化学形态进行了分析。用传统的煎煮法把元素提取以后,分别采用0.45μm微孔滤膜、LSA-10大孔吸附树脂柱、正辛醇/水分配体系,以区分元素的可溶态和悬浮态、有机态和无机态、醇溶态和水溶态,最后用火焰原子吸收光谱法(FAAS)对湿法消解以后的各种元素进行测定。结果表明,6种元素的提取率在14.97%～48.54%,悬浮态的颗粒吸附率在4.02%～19.84%,加标回收率在96.58%～103.9%,RSD(n=6)≤2.4%。

Speciation Analysis of Six Metallic Elements in Lonicera Japonica Thunb

The chemical speciation of six metallic elements, Mn, Fe, Cu, Zn, Ca and Mg in Lonicera Japonica Thunb, were studied. After these elements were extracted by the traditional decoction method, the solution were filtered through 0. 45 ~m membrane and LSA-10 macroporous resin column and treated with the n-C8H17OH-water extraction system in order to differentiate the soluble species from suspended species, organic from inorganic species, the n-C8H17 OH-soluble species from water-soluble species. Finally, the contents of six metallic elements in the solution after dissolution were determined by Flame Atomic Absorption Spectrometric （FAAS）. The results showed that extraction rates for the six elements were in the range of 14.97%-48.54%. The particle adsorption rates of the suspension state were in the range of 4.02%-19.84%. The standard addition recoveries were in the range of 96.58%-103.9% and relative standard deviation （RSD） was （n=6）-2.4%.