ICP-AES法测定广西黄柏中多种金属元素含量

采用干法和湿法对产于广西金秀大瑶山地区的中药黄柏进行高压消解制样，运用电感耦合等离子体原子发射光谱(ICP-AES)法测定了其微量元素Cu，Fe，Zn，Mn，Ni和宏量元素K，Ca，Mg，Sr，Na的含量，并对干法和湿法的测定结果进行了对比，用HNO₃+HClO₄+H₂O₂(体积比5∶1∶1)对黄柏进行消解为宜。方法的相对标准偏差范围为RSD＜5%，回收率在89.4%～113.1%之间。测定结果表明黄柏中含有较丰富的Cu，Fe，Zn，Mn微量金属元素，这对评价黄柏的药用价值和了解其药理作用具有一定的参考作用。

Determination of Contents of Many Kinds of Metal Elements in Phellodendron by ICP-AES

Dry and wet methods were used to digest Phellodendron grown in Jinxiu Dayaoshan of Guangxi with a high-pressure jar and to prepare the samples. The contents of microelements Cu, Fe, Zn, Mn and Ni and macroelements K, Ca, Mg, Sr and Na in Phellodendron were determined by using ICP-AES. Meanwhile, the optimal digestion conditions were found： 7 mL of HNO3 + HClO4 + H2O2 (volume ratio 5:1:1) for 4 h. The work condition and the optical wavelength were selected. The RSD was found to be less than 5% and the recovery rates of all elements were within the range of 89. 4%-113.1%. The determined results agree with the analytical demand, and also indicate that Phellodendron contains high contents of Cu, Fe, Zn and Mn microelements. It is important to assess the medicinal value and understand pharmacological action of Phellodendron by the deterruination of microelements in the Chinese medicine with ICP-AES.