火焰原子吸收法测定柿饼中微量元素的含量

Determination of Trace Elements in Dried Persimmon Produced by Flame Atomic Absorption Spectrometry

通过系列试验对仪器的测定参数进行了优化,消解过程中对消解剂进行优选,建立了测定柿饼中五种微量元素含量的火焰原子吸收光度分析方法。5种元素测定的相对标准偏差RSD在1.1%-2.0%之间,方法检出限在0.13-0.21 ng/mL之间。同步又进行了加标回收试验,方法的回收率在98.2%-103.1%之间。试验表明,柿饼中Cu,Fe,Zn和Mg含量较丰富,分别为3.70,12.55,5.91和5.24μg/g,尤其是Fe含量丰富,可以有效补充人体微量元素,有益于人体健康。

The parameters of the instrument are optimized by series of experiments. In the digestion process of digesting agent is selected to develop for the determination of persimmon in 5 kinds of trace elements content flame atomic absorption spectrophotometric analysis method. The relative standard deviation of the determination of the 5 elements is between 1.1%-2.0%, and the detection limit is 0.13-0.21 ng/mL. In order to verify the reliability of the method, the recovery rate of the method is 98.2% -103.1%. The experiments show that Cu, Fe, Zn, and Mg content is 3.70, 12.55, 5.91, and 5.24 μg/g in dried persimmon, respectively. In particular, the Fe content is rich, which can effectively complement the human body trace elements. And it is beneficial to human health.