电感耦合等离子体原子发射光谱分析中易电离元素的基体干扰及其抑制的研究

Study on the Matrix Interference of Easily Ionized Elements in ICP-AES and Its Suppression

选取铝、铜、镁、钙、铁、锰和锌等7种元素的9条谱线,研究电感耦合等离子体原子发射光谱法对其测定时易电离元素钾、钠的基体干扰。结果表明:易电离元素对待测元素具有较明显的干扰作用,而增大射频发射功率及降低雾化器压力可有效地抑制易电离元素对待测元素的干扰。

Matrix interferences of the easily ionized elements, e. g. K and Na, with the ICP-AES determination of 7 elements （i. e., A1, Cu, Mg, Ca, Fe, Mn and Zn）, were studied. Nine spectral lines of the 7 dements were taken as objectives in the study. It was {ound that the significant interferences due to the easily ionized elements （taking K and Na as example） were effectively inhibited by increasing the radio frequency transmitting power and lowering the atomizing gas pressure.