Influence of Atmosphere on Solution Cathode Glow Discharge Spectroscopy of Silver,Lead and Thallium in Solutions
10.19756/j.issn.0253-3820.241259
- VernacularTitle:气氛对溶液中银、铅和铊的液体阴极辉光放电光谱的影响
- Author:
Zhao-Qing CAI
1
;
Wen-Jing HUANG
;
Zheng WANG
Author Information
1. 中国科学院上海硅酸盐研究所,上海 201899;中国科学院大学材料科学与光电工程中心,北京 100049
- Keywords:
Solution cathode glow discharge;
Spectral analysis;
Silver;
Lead;
Thallium;
Atmosphere
- From:
Chinese Journal of Analytical Chemistry
2024;52(10):1573-1580
- CountryChina
- Language:Chinese
-
Abstract:
The sensitivity issue encountered with solution cathode glow discharge optical emission spectrometry(SCGD-OES)in detecting heavy metals like Ag,Pb and Tl in solutions was alleviated.To enhance the analytical performance of SCGD-OES for heavy metal elements,a quartz chamber structure introducing discharge atmospheres was employed.Spectral characteristics and signal strengths of heavy metal elements under four different atmospheres(Air,pure argon,pure helium and hydrogen-helium mixture)were compared.The findings suggested that inert atmospheres could enhance the excitation capability of SCGD plasma,leading to boosted emission signals of the interested elements,while significantly reducing background radiation by isolating air.Compared to SCGD-OES sustained in air,enclosed SCGD-OES with pure helium as the discharge gas exhibited a signal intensity increase of 2.6-3.8 times for Ag,Pb and Tl,with detection limits improving from 2.5,112.1 and 14.8 μg/L to 0.7,28 and 1.9 μg/L,respectively.
