荆芥不同器官在不同采收时间的ICP-AES矿质元素分析

各种矿质元素在荆芥各器官间贮藏差异。从矿质元素角度了解荆芥合理的药用部位组成以及收时间。应用ICP-AES技术，测定并分析了在不同采收时间，荆芥的不同器官矿质元素含量、累积量和比例。结果显示, 在不同采收时间，(1)荆芥穗中常量矿质元素K, P和微量矿质元素Cu含量最高，荆芥叶中常量元素Mg, Ca, Na和微量元素Fe, Mn, Zn含量最高。(2)荆芥不同器官所含常量元素中Ca和K含量最高，Na含量最低;所含微量元素中Fe含量最高，Mo含量最低。(3)在荆芥茎中，K∶P最高，而Zn∶Cu则为最低;Ca∶Mg和Fe∶Mn在荆芥穗中最低。(4)随着采收时间的推移，各元素在荆芥不同器官中的含量变化并不显著。荆芥茎中各矿质元素含量均较低; 从矿质元素含量的角度看，在合理的采收时间范围内，荆芥的质量受时间影响不显著。

Analysis of Mineral Elements in Different Organs at Different Harvesting Times of Schizonepeta tenuifolia on ICP-AES

To study the main storage organ of each mineral element in Schizonepeta tenuifolia，and explain its reasonable harvesting time and medicinal parts in view of mineral elements. The mineral elements of Schizonepeta tenuifolia in different organs at different harvesting times were determined by ICP-AES technique. The mineral elements，K，Ca，Na，P，Mg，Mn，Zn，Cu，Fe，Mo，were determined in the study. The results showed that at different harvesting times，(1) the contents of K，P，Cu in fringe and the contents of Mg，Ca，Na，Fe，Mn，Zn in leaf were highest among different organs. (2) among the macroelements，the contents of K and Ca were highest while the content of Na was lowest;among the microelements，the content of Fe was highest while the content of Mo was lowest. (3) in item，the proportion of K∶P was highest while the proportion of Zn∶Cu was lowest;in fringe，the proportions of Ca∶Mg and Fe∶Mn were lowest. (4) within the harvest period，variations of the mineral elements were not obvious. Conclusions: In the stem of Schizonepeta tenuifolia，the contents of every mineral elements were lower than other organs，including leaves and spikes. Considering the mineral elements，the correlations of harvesting time and content change were not remarkable.