摘要
本文系根据前文设计的ICP-arc加长炬管,ICP加长炬管及常规炬管,在适宜的的工作条件下,对它们的ICP性能所作的较。分别测定了三种炬管的ICP在不同观测高度的谱线强度分布、激发温度的空间分布以及它们对不同粒度的矿石试样发射的谱线强度。通过数据分析,认为ICP-arc加长炬管装置。
This paper describes an ICP-arc dual discharge system for direct powder sample introduction, which consists of an AC arc placed horizontally in an extension tube of 11 mm above working coil of a conventional torch, and a powder introduction device described earlier. Three plasma discharge the conventional torch, the absence of an additional arc discharge in the ICP-arc dual discharge system and the presence of an additional arc discharge in the ICP-arc dual discharge system are compared, signal intensity and signal-to-background ratio can be enhanced at the higher observation height, the effects of different particle size can be eliminated and the coexisting elements and matrix interferences can be reduced with the plasma of additional arc discharge. The experimental results of spatial measurements about excitation temperature with three plasma discharge indicate that excitation temperature in the central plasma is relatively low when the observation height is between 8 and 17 above the working coil with the latter. The efficiencies of evaporation and atomization of samples can be improved significantly with these novel direct powder sample introduction system.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1991年第1期44-48,共5页
Spectroscopy and Spectral Analysis
