| 光谱学与光谱分析 |
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| Determination of Trace Elements in Lophatherum Gracile Brongn from Different Habitat by Microwave Digestion-Atomic Absorption Spectroscopy |
| YUAN Ke1, XUE Yue-qin1, GUI Ren-yi1, SUN Su-qin2, YIN Ming-wen3 |
1. Research and Development Center of Natural Medicine, Zhejiang Forestry University, Lin’an 311300, China
2. Department of Chemistry, Tsinghua University, Beijing 100084, China
3. Department of Chemistry, Zhengzhou University, Zhengzhou 450052, China |
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Abstract A method of microwave digestion technique was proposed to determine the content of Zn，Fe，Cu，Mn，K，Ca，Mg，Ni，Cd，Pb，Cr，Co，Al，Se and As in lophatherum gracile brongn of different habitat by atomic absorption spectroscopy. The RSD of the method was between 1.23% and 3.32%, and the recovery rates obtained by standard addition method were between 95.8 ％and 104.2％. The results of the study indicate that the proposed method has the advantages of simplicity, speediness and sensitivity. It is suitable for the determination of the contents of metal elements in lophatherum gracile brongn. The experimental results also indicated that different areas’ lophantherum gracile brongn had different trace elements content. The content of trace elements K, Mg, Ca, Fe and Mn beneficial to the human body was rich. The content of the heavy metal trace element Pb in lophantherum gracile brongn of Hunan province was slightly high. The content of the heavy metal trace element Cu in lophantherum gracile brongn of Guangdong province and Anhui province is also slightly higher. Beside, the contents of harmful trace heavy metal elements Cd，Cu，Cr，Pb and As in lophatherum gracile brongn of different habitat are all lower than the limits of Chinese Pharmacopoeia and Green Trade Standard for Importing and Exporting Medicinal Plant and Preparation and National Food Sanitation Standard. These determination results provided the scientific data for further discussing the relationship between the content of trace elements in lophantherum gracile brongn and the medicine efficacy.
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Received: 2008-12-10
Accepted: 2009-03-20
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Corresponding Authors:
YUAN Ke
E-mail: yuan_ke001@163.com
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