一种原子光谱分析用新激发光源——千瓦级微波等离子体炬(kW-MPT)

Based on the simulation of transmission and distribution characteristics of the electromagnetic field inmicrowave plasma torch(MPT) torches with different configurations using electromagnetic simulation software and experimental study, a new MPT torch with double resonant configuration was, for the first time, developed. The results show that the inner tube of MPT torch plays an important role in strengthening the electric field intensity at the open end of the MPT torch and redistributing the electromagnetic field in the whole torch by the formation of the double resonance. It contributes also to enhance the macroscopic stability and the self-sustaining of the plasma. The stability of the plasma was shown to be excellent when the spacer between inner and intermediate tubes is located about 20—30 mm from the top opening of the torch. Preliminary study showed that the analytical performance for 13 common elements was approaching that of traditional ICP-AES.     

电感耦合等离子体发射光谱法同时测定磷矿和磷肥样品中高含量磷及其他常量元素

1 引言 在磷肥的生产过程中,对其原料、中间产物及产品中的磷、钙、镁、钾、钠、铁和铝等元素的分析是十分重要的。通常需要用重量分析,原子吸收光谱法以及紫外可见分光光度法等分析手段,操作繁琐、费时。我们用电感耦合等离子体发射光谱法(ICP-AES)同时测定磷矿,磷肥样品中的高含量磷和其他六种常量元素,大大缩短了分析时间,方便了工业生产和工艺研究。同时,采用基体匹配和紧密内插的方法,改