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采用一种新型的旋流雾室取代常规的双管(或Scott型)雾室,改善ICP-AES分析样品气溶胶的性质,以强大的离心力增强气溶胶雾滴的筛选分离效果和分析物粒子的浓度,在不改变ICP-AES分析仪器系统的其它工作条件下,使得11种稀土元素的测定下限分别降低了0.5—1个数量级。文中对旋流雾室和常规的双管雾室进行了载气的最佳化实验,以及15种稀土元素的信背比、测定下限、信号稳定性的比较和分析方法对照结果。
A new type of swirling mist chamber is used to replace the conventional two-tube (or Scott-type) mist chamber to improve the properties of ICP-AES for sample aerosols. The strong centrifugal force enhances the screening and separation of aerosol droplets and the separation of analyte particles , The determination limits of 11 kinds of rare earth elements were reduced by 0.5 to 1 order of magnitude respectively under the other operating conditions without changing the ICP-AES analytical instrument system. In this paper, the optimal experiments of carrier gas for cyclone spray chamber and conventional double-tube spray chamber were carried out, and the signal-to-background ratios, the lower limit of determination and signal stability of 15 kinds of rare earth elements were compared and analyzed.