摘要
样品经微波消解仪消化,超声波提取,微孔滤膜过滤,D101大孔树脂分离,电感耦合等离子体-原子发射光谱法(ICP-AES)测定,对黄芪中的Fe、Ca、Mg、Cu、Zn、Mn、Ni7种元素进行形态分析;结果表明Ca元素在黄芪中含量及提取率最高,Cu元素的含量最低;Mn的提取率最低;7种元素的可溶态均大于悬浮态;且采用超声波提取比常规水浴提取效果好。该方法检出限在2.1—38ng·mL-1之间,相对标准偏差小于2.8%,用于标准样品分析,结果与参考值吻合。
The different speciation contents of calcium, magnesmm ,copper,Iron, zinc, manganese, ana nickel in Chinese herbal radix astragali were determined by ICP-AES with ultrasonic extraction, 0.45μm membrane fikration,D101 resin separation and microwave digestion. Among the seven elements,the content and extraction rate of Ca are the highest,the lowest extraction rate and content are Mn and Cu, respectively, and all of seven elements are in the soluble species rather than suspensible species. Ultrasonic extraction rate is better than that in the water-bath. The detection limit is 2.1-38ng·mL^-1 with relative standard deviation less than 2.8%. This method was applied to the analysis of national certified reference material ,and the results were in good agreement with the reference values.
出处
《光谱实验室》
CAS
CSCD
2005年第5期1035-1039,共5页
Chinese Journal of Spectroscopy Laboratory
