固体直接进样大功率微波诱导氮等离子体发射光谱法测定金属元素

本文研究了固体直接进样大功率微波诱导氮等离子体发射光谱法测定固态样品中的微量金属元素的可行性。结果表明,采用自组装的固体进样系统,可方便有效的将固体粉末样品导入微波等离子体中并在等离子体中被分解和激发。进样的重现性和稳定性均较好。对于样品中的主要组分,测定的相对标准偏差可控制在1％以内,对微量组分可控制在10％以内。

Determination of Trace Metals by Direct Solid Sample Introduction and High Power Microwave Induced Nitrogen Plasma Atomic Emission Spectrometry

The possibility of using direct solid sample introduction coupled with high power microwave induced nitrogen plasma atomic emission spectrometry to determine trace metals in solid samples was investigated. The experimental results show that the solid powder sample could be readily introduced into the plasma with good stability and reproducibility by using a self-assembled solid sample introduction system. The relative standard deviation of the measurements could be controlled to be less than 1 % for major components and less than 10% for minor components in the solid samples.