摘要
研究了小功率空气-氩气混合气冷却ICP中4种元素(钙、钡、铜、锌)、8条谱线的强度和信背比随冷却气组成及观测高度的变化,并估算了折中条件下的检出限。对于离子线及激发电位较高的原子线,冷却气中引入体积分数为5%~10%空气后,谱线强度最大并大于Ar-ICP中数值;对于激发电位较低的原子线,随着冷却气中空气含量的增大其谱线强度逐渐减小。
The dependence of net emission intensity and signal-background ratio on the coolant gas composition and the observation height for 8 lines of the four elements(Ca,Ba,Cu,Zn) in the low power ICP with air-Ar mixed coolant gas was studied,and the detection limits under compromise conditions were estimated, too. The results showed that lines for ions and neutral atoms with high excitation energy had maximum intensity and were superior to that in the Ar-ICP, when 5%~10% air was added to the coolant gas; the intensity of lines for neutral atoms with low excitation energy dropped gradually as air was added to the coolant gas; the signal-background ratio of analytic line was depended upon its excitation potential and wavelength.
出处
《分析测试学报》
CAS
CSCD
1999年第1期35-38,共4页
Journal of Instrumental Analysis
关键词
谱线强度
信背比
钙
钡
铜
锌
ICP
AES
Mixed coolant gas
ICP
Intensity of atom lines
Signal-background ratio