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Solution Cathode Glow Discharge - Atomic Emission Spectrometry (SCGD-AES) With an Interference Filter for Spectral Discrimination for the Determination of Thallium in Surface Water

文献类型： 外文期刊

作者： Wang, Jinmei 1 ; Fei, Guoxing 1 ; Zheng, Peichao 1 ; Yan, Nantian 1 ; Chen, Guanghui 1 ; Li, Wei 1 ; Dong, Daming 2 ; Guo, Lianbo 4 ;

作者机构： 1.Chongqing Univ Posts & Telecommun, Coll Optoelect Engn, Chongqing Municipal Level Key Lab Photoelect Infor, Chongqing, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Res Ctr Intelligent Equipment, Beijing, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Agr Sensors, Beijing, Peoples R China

4.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan, Hubei, Peoples R China

5.Chongqing Univ Posts & Telecommun, Coll Optoelect Engn, Chongqing Municipal Level Key Lab Photoelect Infor, Chongqing 400065, Peoples R China

关键词： Heavy metals; interference filters; solution cathode glow discharge atomic emission spectrometry (SCGD-AES); thallium

期刊名称：ANALYTICAL LETTERS （ 影响因子：1.6； 五年影响因子：1.9 ）

ISSN： 0003-2719

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Solution cathode glow discharge atomic emission spectrometry (SCGD-AES) using wide-bandpass (10-nm) interference filters (IF) as a spectral discrimination device was used for the determination of thallium (Tl) in surface water. The use of wide-bandpass interference filters greatly reduces the cost of traditional detection instruments. The influence of solution flow rate, discharge current and pH on the detection limit was characterized. Moreover, matrix effect experiments were performed to study the effect of different concentrations of Na+, K+, Ca2+, and Mg2+ on the Tl signal intensity. Using a solution flow rate of 2.8 mL/min, a discharge current of 50 mA, and pH of 1.0 with HNO3 as the supporting electrolyte, SCGD coupled with an interference filter provided a detection limit of 7.76 mu g/L for Tl in water samples, comparable to traditional SCGD-AES. Furthermore, the spiked recovery rate of Tl is quantitative in real water samples and comparable to the performance of inductive coupled plasma - optical emission spectrometry (ICP-OES).

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