采用先灰化、再用体积比为4:1的HNO_3-HClO_4混酸常压微沸条件下消解半夏样品,火焰原子吸收光谱法测定半夏中的金属元素Na、K、Ca、Mg、Fe、Cu、Zn、Co、Mn、Pb、Ni、Cd含量,研究了测定不同元素的仪器最佳工作条件,并作了方法的准确性和精密度考察。结果表明,半夏中Na、K、Ca、Mg、Fe、Cu、Zn、Co、Mn、Pb、Ni的含量分别为1172.09,1000.13,11098.56,1690.48,103.93,9.35,56.75,88.39,10.70,8.79,70.62μg/g,Cd未测出。方法的加标回收率为96.45%—104.5%,精密度RSD(n=9)为0.34%—2.7%。测定方法简单易行、快速、准确,结果令人满意。 The content of Na, K, Ca, Mg and Fe in the Pinellia ternata was determined by flame atomic absorption spectrometry (FAAS) , Cu, Zn, Co, Mn, Pb, Ni and Cd were studied. The optimum working conditions of different elements were studied. The accuracy and precision of the method were also investigated. The results showed that the contents of Na, K, Ca, Mg, Fe, Cu, Zn, Co, Mn, Pb and Ni in Pinellia ternata were 1172.09,1000.13,11098.56,1690.48,103.93,9.35,56.75,88.39,10.70,8.79 , 70.62μg / g, Cd not detected. The recovery of the method was 96.45% -104.5%, and the precision of RSD (n = 9) was 0.34% -2.7%. The determination method is simple, fast, accurate and the results are satisfactory.