Effects of anode geometry on the analytical performance of solution-cathode glow discharge for alkali metal detection by atomic emission spectroscopy
文献类型： 外文期刊
作者： Wang, Jinmei 1 ; Li, Wei 1 ; Zheng, Peichao 1 ; Li, Biao 1 ; Zhang, Biyong 1 ; Guo, Lianbo 2 ; Tian, Hongwu 3 ; Dong, Daming 3 ;
作者机构： 1.Chongqing Univ Posts & Telecommun, Coll Optoelect Engn, Chongqing 400065, Peoples R China
2.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Res Ctr Intelligent Equipment, Beijing 100097, Peoples R China
4.Minist Agr & Rural Affairs, Key Lab Agr Sensors, Beijing 100097, Peoples R China
期刊名称：JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY （ 影响因子：3.1； 五年影响因子：3.1 ）
ISSN： 0267-9477
年卷期： 2025 年 40 卷 2 期
页码：
收录情况： SCI
摘要： The effect of anode geometries on the analytical performance of the solution-cathode glow discharge (SCGD) source was investigated using tungsten rods with varying diameters and conical angles for atomic emission spectroscopy (AES). Under optimal operational parameters (electrolyte solution: HNO3 at pH 1.0, discharge current: 65 mA, solution flow rate: 1.9 mL min-1, and discharge distance: 2.0 mm), the highest emission intensity and stability for Na, Rb, K, Li, and Cs were obtained at the tungsten rod with a diameter of 2.4 mm, with relative standard deviations (RSD) of 1.14%, 0.93%, 1.01%, 1.25%, and 0.94%, respectively, while achieving the best detection limits (DLs). Additionally, when the anode tip had a conical angle of less than 30 degrees, thermal melting resulted in discharge instability. A conical angle greater than 90 degrees induced thermal spreading, leading to instability. Higher emission intensity stability and lower DLs were achieved with a conical angle of 60 degrees. These results may provide new insights for enhancing the performance of SCGD systems.
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