电感耦合等离子体原子发射光谱法测定氧化锌粉中钾钠

通过对仪器测定参数的优化，建立了在稳健性条件下测定氧化锌粉中钾和钠的电感耦合等离子体原子发射光谱法。试验结果表明，采用基体匹配的校准曲线，在稳健性条件下测定，基体效应较小，试样中基体锌的含量在一定范围内波动对钾、钠的测定没有影响。因此，在日常分析中，就可以使用同一基体匹配校准曲线分析锌含量不同的氧化锌粉中钾和钠。氧化锌粉中其他元素含量很低，对钾、钠的测定没有影响，且被测元素间也不存在相互干扰。方法已用于氧化锌粉中钾和钠的测定，相对标准偏差≤1.2%，加标回收率在94%～103%之间。

Determination of potassium and sodium in zinc oxide powder by inductively coupled plasma atomic emission spectrometry

The determination of potassium and sodium in zinc oxide powder by inductively coupled plasma atomic emission spectrometry under steady conditions was established by optimizing the instrumental parameters. The results showed that, the matrix effect was low under steady conditions when calibration curves of matrix matching was used. As the content of matrix zinc in sample varied in a certain range, it had no influence on the determination of potassium and sodium. Therefore, the potassium and sodium in zinc oxide powder containing various contents of zinc could be determined using one calibration curve of matrix matching in routine analysis. The content of other elements in zinc oxide powder was very low and had no influence on the determination of potassium and sodium. Moreover, there was no mutual interference among testing elements. The proposed method was applied to the determination of potassium and sodium in zinc oxide powder. The relative standard deviation (RSD) was less than or equal to 1.2%. The recoveries of standard addition were between 94% and 103%.