| 光谱学与光谱分析 |
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| Evaluation and Analysis of Inorganic Elements in Ginkgo Biloba Leaves by Microwave Digestion-ICP-AES |
| YAO Xin, ZHOU Gui-sheng, TANG Yu-ping*, SHANG Er-xin, SU Shu-lan, QIAN Da-wei, DUAN Jin-ao |
| Jiangsu Key Laboratory for High Technology of TCM Formulae Research, Nanjing University of Chinese Medicine, Nanjing 210046, China |
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Abstract Inorganic elements were determined by ICP-AES using microwave digestion, and principal components analysis(PCA) was used for analysis. The result showed that ginkgo biloba leaves contained more than 22 inorganic elements, Fe, Zn, Cu, Mn, Cr, Co, Ni, Sr, B, Si and Ni were essential trace elements, and Ca，P，K，Na and Mg were essential macro elements. PCA with seven factors (F1, F2, F3, F4, F5, F6, F7) selected could be used to evaluate the quality of ginkgo biloba leaves. The function was following F=0.230 17F1+0.122 39F2+0.079 67F3+0.078 97F4+0.065 25F5+0.062 03F6+0.056 71F7. The samples from Taixing, Shijiazhuang and Taian was the top three which indicated the quality in those cultivation sources was better based on inorganic elements. All the results will provide good basis for comprehensive utilization of ginkgo biloba leaves, especially the leaves from fruit cultivars.
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Received: 2012-08-09
Accepted: 2012-11-21
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Corresponding Authors:
TANG Yu-ping
E-mail: yupingtang@njutcm.edu.cn
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