Enhancing the detectability of Ag, Cd, Hg, In, Pb, Tl, and Zn in water by solution anode glow discharge coupled with argon jet cathode and external magnetic field

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL

Talanta Pub Date : 2025-06-18 DOI:10.1016/j.talanta.2025.128487

Jie Yu , Kai Wang , Xuehe Li , Yongjie Zhou , Chuang Zhang , Xiaoyun Fang , Chenxu Liang , Quanfang Lu

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Abstract

An atomic emission spectrometry based on solution anode glow discharge coupled with argon jet cathode and magnetic field (SAGD-AJC-MF) was constructed for the detection of trace Ag, Cd, Hg, In, Pb, Tl, and Zn in water samples, where a plasma was produced between a platinum spiral-wrapped ceramic capillary anode and an argon jet titanium (Ti) nozzle cathode, and an external magnetic field was used to enhance excitation efficiency by altering electron trajectories and increasing the collision frequency between electrons and neutral atoms. The results found that the optimal operating parameters are pH = 1.6 HNO₃ as supporting electrolyte, 3.4 mL min⁻¹ solution flow rate, 300 mL min⁻¹ Ar flow rate, and 2.0 mm discharge gap. A 0.55 T external magnetic field reduces the red-hot degree of the cathode Ti nozzle, widen the application range of voltage and reduce the interference. The emission intensities, sensitivities and limit of detection (LOD) were improved by 2.0–3.3, 2.6–4.7 and 2.8–5.2 times, respectively. The SAGD-AJC-MF are employed for the analysis of water samples by standard addition method, the measured results are basically consistent with those obtained by ICP-AES, and the recoveries in spiked Yellow River and wastewater samples are ranged from 89.2 % to 107.8 %, confirming the feasibility, accuracy and reliability. In short, the SAGD-AJC-MF has outstanding performance in water quality monitoring and environmental warning due to a compact, portable and low-cost analytical instrument.

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采用溶液阳极辉光放电耦合氩射流阴极和外加磁场增强对水中Ag、Cd、Hg、In、Pb、Tl和Zn的检测能力

建立了一种基于溶液阳极辉光放电耦合氩射流阴极和磁场的原子发射光谱法（SAGD-AJC-MF），在铂螺旋包裹陶瓷毛细管阳极和氩射流钛（Ti）喷嘴阴极之间产生等离子体，用于检测水样中微量Ag、Cd、Hg、In、Pb、Tl和Zn。外加磁场通过改变电子运动轨迹和增加电子与中性原子的碰撞频率来提高激发效率。结果表明，最佳工作参数为：pH = 1.6 HNO3作为支撑电解质，3.4 mL min - 1溶液流量，300 mL min - 1 Ar流量，2.0 mm放电间隙。0.55 T的外加磁场降低了阴极钛喷嘴的红热程度，扩大了电压的适用范围，减小了干扰。发射强度、灵敏度和检出限分别提高2.0 ~ 3.3倍、2.6 ~ 4.7倍和2.8 ~ 5.2倍。采用SAGD-AJC-MF对水样进行标准加入法分析，测定结果与ICP-AES法基本一致，加标后的黄河和废水样品的回收率为89.2% ~ 107.8%，证实了该方法的可行性、准确性和可靠性。总之，SAGD-AJC-MF分析仪器结构紧凑、便携、成本低，在水质监测和环境预警方面具有突出的性能。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.