Direct Determination of Heavy Metals in Soil by Point Discharge Atomic Emission Spectrometry through Graphite-doped Sample Preparation
10.19756/j.issn.0253-3820.241313
- VernacularTitle:基于石墨掺杂制备样品的尖端放电原子发射光谱法直接测定土壤中重金属
- Author:
Yan-Qi XIONG
1
;
Han YAN
;
Jia-Deng CHEN
;
Yun-Fei TIAN
;
Xian-Deng HOU
Author Information
1. 四川大学分析测试中心,成都 610064
- Keywords:
Atomic emission spectrometry;
Solid sample analysis;
Heavy metals;
Point-discharge microplasma;
Miniaturized instrument
- From:
Chinese Journal of Analytical Chemistry
2024;52(10):1528-1535
- CountryChina
- Language:Chinese
-
Abstract:
The analysis of poorly conductive samples using discharge plasma is a significant challenge in determining elemental content by atomic emission spectrometry.In this study,graphite as a conductive medium was combined with metal salts and silica to prepare soil sample pellets.A tungsten needle electrode was employed to generate point discharge microplasma with the sample,exciting atomic emission signals of analyte elements.By using Cu 324.7 nm as the analytical line,both the capability to excite atomic emission spectral lines and the impact of experimental conditions were investigated,resulting in accurate determination of trace copper in both standard and real samples.This method held promise for detecting other metals like manganese,iron,and zinc.This work offered methodology for non-conductive sample analysis via discharge plasma atomic emission spectrometry,showing potential for rapid on-site assessment of soil samples.
