用浓硝酸微波消解处理样品,火焰原子吸收光谱法测定莫氏兰根中K、Ca、Mg、Cu、Zn、Mn、Pb和Cd8种微量元素的含量。测定结果表明,所测的各微量元素的校准曲线的相关系数为0.9990—0.9998,回收率为97.56%—103.85%,方法检出限为0.0012—0.0143mg/L,相对标准偏差小于3.0%。该方法操作简便、快速,结果准确,是莫氏兰根中的微量元素含量测定的理想方法。 The contents of trace elements K, Ca, Mg, Cu, Zn, Mn, Pb and Cd in Morandranthes were measured by microwave digestion with concentrated nitric acid and flame atomic absorption spectrometry. The results showed that the correlation coefficients of the calibration curves of trace elements were 0.9990-0.9998 and the recoveries were 97.56% -103.85%. The detection limits were 0.0012-0.0143 mg / L and the relative standard deviations were less than 3.0%. The method is simple, rapid and accurate. It is an ideal method for the determination of trace elements in moracean roots.