Yuanhang Wang , Yuwei Tian , Cong Liu , Zhixing Gao , Zhenlin Hu , Hongyu He , Daqing Yuan , Zhao Wang
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引用次数: 0
Abstract
To ensure the safe operation of pressurized water reactors, the real-time and high-sensitive monitoring of Li and Zn in primary cooling water is required. Laser-induced breakdown spectroscopy (LIBS) is a real-time analytical method with great application potential for elemental monitoring in primary cooling water. However, when LIBS directly detects liquids, plasma quenching will reduce the detection sensitivity. In this work, capillary effect-enhanced LIBS (CE-LIBS) was proposed to improve the detection sensitivity of elements in aqueous solutions. Titanium foam substrates were used to enrich the solutes in the solutions. The signal enhancement mechanisms of the method were analyzed. The results showed that the solutes were enriched on the surface of the titanium foam substrate due to the capillary effect. The excitation temperature and electron density of the laser-induced plasma were both increased by the titanium foam substrate, thus increasing the plasma emission intensity. The limits of detection of Li and Zn were 0.41 and 3.83 ng/mL by using CE-LIBS, which can fully meet the requirements of Li and Zn monitoring in primary cooling water. The practicability of the method was demonstrated by analyzing simulated primary cooling water samples, and the recovery values of Li and Zn were in the range of 92–105 % and 96–102 %, respectively. The CE-LIBS does not require additional treatment of the substrate, and the detection process is simple and fast. Results indicated that the CE-LIBS method has broad application prospects in the real-time and high-sensitivity detection of elements in aqueous samples.
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.
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