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Microwave Digestion- Dual Channel Atomic Fluorescence Spectrometry for Determination of Selenium and Germanium in Chinese Herbs

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【作者】 Chunyan LANGXiangfei ZHOUChengjie DENGXiaorong WULi ZHOU

【Author】 Chunyan LANG;Xiangfei ZHOU;Chengjie DENG;Xiaorong WU;Li ZHOU;College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology;

【机构】 College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology

【摘要】 [Objective] To conduct simultaneous determination of selenium and germanium content in traditional Chinese medicine,such as wild RHIZOMA GASTRODIAE,RADIX POLYGONI MULTIFLORI,RADIX ANGELICAE SINENSIS,RADIX ADENOPHORAE,and RHIZOMA COPTIDIS,by hydride generation-atomic fluorescence spectroscopy. [Methods] The samples were prepared by nitric acid-hydrogen peroxide microwave digestion,using phosphoric acid as the medium and thiourea as the pre-reductant,the selenium and germanium contents of traditional Chinese medicine were determined by dual channel atomic fluorescence spectrometry. [Results] Under the optimized conditions,the instrumental detection limits of selenium and germanium were 0. 25 and 1. 46 ng / m L,and the RSDs were 1. 9%( 5 ng / m L,n = 10) and2. 9%( 10 ng / m L,n = 10),and the recoveries were 91. 7%- 97. 2% and 89. 5%- 95. 7% with RSD less than 4%( n = 10),respectively.The linear ranges were all 0- 300 ng / m L. Interference ions as Cr3 +,Cu2 +,Zn2 +and Co2 +had the biggest influences on selenium,while Pb2 +and Ni2 +the biggest influences on germanium. These interference ions were not considered,because their contents were not high enough to disturb selenium and germanium determination. [Conclusions]The selenium contents of 5 kinds of medicinal materials were in the range of533. 1- 1 773 ng / g,the order was: wild RHIZOMA GASTRODIAE > RHIZOMA COPTIDIS > RADIX POLYGONI MULTIFLORI > RADIX ANGELICAE SINENSIS > RADIX ADENOPHORAE; the germanium content range was 253. 9- 842. 5 ng / g,the order was: wild RHIZOMA GASTRODIAE > RADIX ADENOPHORAE > RADIX ANGELICAE SINENSIS > RADIX POLYGONI MULTIFLORI > RHIZOMA COPTIDIS. Two element contents of wild RHIZOMA GASTRODIAE were higher than that of other cultivated samples.

【所属期刊栏目】 Chemical Composition of Natural Medicine (2015年Z1期)
  • 【分类号】R284.1
  • 【下载频次】42
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