冬虫夏草中铁、锌、钙微波消解火焰原子吸收法测定

目的：建立一种测定冬虫夏草中铁、锌、钙含量的新方法，方法：采用微波消解样品，用火焰原子吸收法（FAAS）测定冬虫夏草中Fe,Zn,Ca的含量，并以茶叶标准物质为对照品。结果：Fe,Zn,Ca的线性范围分别为0－10.0mg/L、0－6．0mg/L、0－10．0mg/L，回收率均在97％－102％，对5．0mg/LFe,2.0mg/L Zn,6.0mg/L Ca分别测定5次，RSD分别为1．2％、0．8％、2．1％，检出限分别为0．0071mg/L、0．0056mg/L、0．0069mg/L，对茶叶标准物进行测定，测得值均在标准值范围之内，结论：本方法可用于冬虫夏草中Fe,Zn,Ca含量的测定，结果准确，简便。

Determination of Fe, Zn and Ca in Cordyceps sinensis (Berk.) Sacc. by microwave digestion-flame atomic absorption spectrometry

Aim:To develop a new method to determine the level of Fe.Zn and Ca in Cordyceps sinensis (Berk. )Sacc. Methods:The samples were digested by microwave. Flame atomic absorption spectrometry was used to determine the level of Fe, Zn and Ca in Cordyceps sinensis (Berk. ) Sacc, and tea standard matter was taken as control. Results; The linear ranges of Fe.Zn and Ca were 0-10.0 mg/L,0 -6.0 mg/L,0 - 10.0 mg/L, respectively; the recoveries were 97% - 102% (n = 5) ,the RSD was 1.2% ,0.8% and 2. 1% respectively,the limits of detection were 0.007 1 mg/L,0.005 6 mg/L and 0.006 9 mg/L. The detection of tea standard matter was in the range of standard levels. Conclusion: The method is convenient, accurate, rapid,and suitable for determination of Fe,Zn and Ca in Cordyceps sinensis (Berk. )Sacc.