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

Hongwu Tian; Chuanxia Li; Leizi Jiao; Xiande Zhao; Daming Dong

doi:10.1117/12.2628538

16 February 2022 Study on rapid detection method of water heavy metals by laser-induced breakdown spectroscopy coupled with liquid-solid conversion and morphological constraints

Hongwu Tian, Chuanxia Li, Leizi Jiao, Xiande Zhao, Daming Dong

Author Affiliations +

Proceedings Volume 12164, International Conference on Optoelectronic Materials and Devices (ICOMD 2021); 1216408 (2022) https://doi.org/10.1117/12.2628538
Event: 2021 International Conference on Optoelectronic Materials and Devices, 2021, Guangzhou, China

Abstract

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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Hongwu Tian, Chuanxia Li, Leizi Jiao, Xiande Zhao, and Daming Dong "Study on rapid detection method of water heavy metals by laser-induced breakdown spectroscopy coupled with liquid-solid conversion and morphological constraints", Proc. SPIE 12164, International Conference on Optoelectronic Materials and Devices (ICOMD 2021), 1216408 (16 February 2022); https://doi.org/10.1117/12.2628538

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KEYWORDS

Laser induced breakdown spectroscopy

Liquids

Lead

Agriculture

Coating

Optical filters

Pollution

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