Medicinal Plant

2016, v.7(Z4) 28-30+32

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Determination of Cadmium Content in CHUANXIONG RHIZOMA by Microwave Digestion—Graphite Furnace Atomic Absorption Method
Determination of Cadmium Content in CHUANXIONG RHIZOMA by Microwave Digestion—Graphite Furnace Atomic Absorption Method

Yang LI;Guiqi HAN;Nan HE;Biao HUANG;Cheng PENG;Jinlin GUO;

摘要(Abstract):

[Objective] To establish an analysis method for accurately determining the cadmium content in CHUANXIONG RHIZOMA.[Methods]Tuberous roots of CHUANXIONG RHIZOMA were pulverized and 0. 1g of the powder was digested by microwave digestion. After25 min of digestion,the acid was driven away by heating and diluted to 100 m L. The cadmium content of the sample solution was detected by graphite furnace atomic absorption method. 1. 0 g / L phosphoric acid was used as the matrix modifier and the ashing temperature was increased to 550 ℃. [Results]The detection limit was 0. 08 mg / kg,and the intraday precision( % RSD,n = 6) was 0. 2%- 6. 5% in the linear range of 0. 08- 2. 0 μg / L. 48 samples of CHUANXIONG RHIZOMA in 5 planting regions were measured with the recovery rate of 96. 0%-109. 6%. [Conclusion] The method established in this study is sensitive,accurate,high efficient and easy to be popularized. It will provide a reliable quantitative method for determining the distribution of cadmium content in CHUANXIONG RHIZOMA.

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基金项目(Foundation): Supported by Project of National Natural Science Foundation and Sci-Tech Development Foundation of Chengdu University of TCM

作者(Author): Yang LI;Guiqi HAN;Nan HE;Biao HUANG;Cheng PENG;Jinlin GUO;

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