Study on rapid detection method of water heavy metals by Laser-induced breakdown spectroscopy coupled with liquid-solid conversion and morphological constraints

文献类型： 外文期刊

第一作者： Tian, Hongwu

作者： Tian, Hongwu;Tian, Hongwu;Li, Chuanxia;Jiao, Leizi;Zhao, Xiande;Dong, Daming;Li, Chuanxia;Jiao, Leizi;Zhao, Xiande;Dong, Daming

作者机构：

关键词： surface water; heavy metal; Laser-induced breakdown spectroscopy; rapid detection

期刊名称：INTERNATIONAL CONFERENCE ON OPTOELECTRONIC MATERIALS AND DEVICES (ICOMD 2021)

ISSN： 0277-786X

年卷期： 2022 年 12164 卷

页码：

收录情况： SCI

摘要： High-sensitivity and rapid detection of heavy metal elements in water is in great demand. Traditional laboratory analysis methods limited to long cycles, complex processing, and risk of secondary pollution, which made it impossible to achieve on-site detection. Laser-induced breakdown spectroscopy (LIBS) has the characteristics of rapid and minimal damage and has been applied to the detection of solids, liquids and even gases. However, it is difficult to directly detect with LIBS due to the low content of heavy metals in water and the matrix effect of samples. We propose a rapid detection method of heavy metal elements in water by laser-induced breakdown spectroscopy combined with sample morphology constrained positioning. Using Pb as a representative element, analyze the enhancement effect and mechanism of the above sample processing method on the LIBS signal, and establish a calibration curve with a concentration range of 100-1000 ug/L. The correlation coefficient R2 is 0.97, and the detection limit reaches 86.6 ug/L., which meets the requirements of surface water quality testing. The study combined with portable LIBS equipment can provide a low-cost and rapid screening method for heavy metal pollution in surface water.

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