原子吸收分光光度法测定连翘提取液中重金属含量

以连翘为原料,用火焰原子吸收分光光度法测定了连翘提取液中铅、铬、镉、铜、锌含量。实验结果表明,连翘中铅、铬、镉、铜、锌含量依次为0.78,0.55,0.09,13.31,38.86μg/g,平均加标回收率为99.72%,97.02%,98.50%,99.81%,99.51%。精密度和重复性分析的RSD分别为3.47%,2.83%,4.21%,1.03%,0.52%和1.26%,1.77%,4.07%,0.19%,0.10%。