不同产地黄芪中Zn含量及溶出率的比较

Comparing Zn Content of Habit Radix Astragali in Different Locality of Growth and Zn Dissolving Rate

酸消解后测定Zn总量,在超声波作用下,用水或乙醇分别提取,测定Zn的溶出率,采用火焰原子吸收光谱法测定吉林、山东、山西黄芪中Zn的含量。吉林、山西黄芪含Zn差别不大,均比山东黄芪含Zn量高;对于Zn的溶出,山东黄芪使用水时的溶出率远远高于使用乙醇,而其他两地黄芪中Zn的溶出率却是乙醇略高于水。因生长土壤的不同,导致黄芪中金属元素含量的不同,其所含有机成分或纤维组织结构的差异,也会使不同溶剂对Zn离子的溶出率产生影响。

The samples were acid digested,and Zn in the sample was dissolved in water or ethyl alcohol with supersonic wave,and determined by flame atomic absorption speetrophotometry. There is a little different in Zn in Jilin and Shanxi,they both are higher than Shandong＇s. Zn dissolving rate with water is higher than that with ethyl alcohol in Shandong, on the contrary , in another two radix astragali. Different soil cause its difference of metallic element content. Moreover, the organic ingredient and the fiber structure difference also can cause the different dissolving rate.