Methods:The samples were digested by wet method; flame atomic absorption spectrophotometry (FAAS) was used to determine the level of Cu, Zn, and Fe in achyranthes.

• 方法:样品采用湿法消解,以火焰原子吸收光谱法在同一体系中测定不同产地、不同炮制方法的牛膝样品中铜、锌、铁的含量,并对结果分析比较。