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目的:建立测定常山胡柚中铁、锰、铜、锌等6中微量元素的方法。方法:采用浓硝酸、过氧化氢(体积比3∶1)混合液对样品进行消解,火焰原子吸收法测定锌、镉、铁、锰、铅、铜的含量。结果:用6种元素的标准溶液制作了各自的标准曲线,所得线性回归方程的相关系数在0.9991~0.9999之间。在常山胡柚样品的基础上,加入一定量6种元素的标准溶液作回收率试验,得回收率在98.3%~101%之间。结论:本法用微波融样,原子光谱法同时测定常山胡柚中多种微量元素,具有快速、简便、节省试剂、消解完全、污染少等特点,结果令人满意。
Objective: To establish a method for determination of 6 trace elements in iron, manganese, copper and zinc in Changshan Huyou. Methods: The sample was digested with a mixture of concentrated nitric acid and hydrogen peroxide (3: 1 by volume). The contents of zinc, cadmium, iron, manganese, lead and copper were determined by flame atomic absorption spectrometry. Results: The standard curve of six kinds of elements was made. The correlation coefficient of the linear regression equation was between 0.9991 and 0.9999. On the basis of Changshan grapefruit samples, a certain amount of six elements of standard solution for the recovery test, the recovery was 98.3% ~ 101%. Conclusion: This method uses microwave melting, atomic spectrometry simultaneous determination of trace elements in Changshan Huyou, with fast, simple, saving reagents, complete digestion, less pollution, the results are satisfactory.