Heavy metal pollution detection method and device based on laser-induced breakdown spectroscopy

• Main Authors: FAN GUOZHU, ZHANG HAILIANG, ZHAN BAIZHUO, XU HUANQING, LUO WEI, LIU XUEMEI
• Format: Patent
• Language: Chinese; English
• Published: 24.10.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a heavy metal pollution detection method and device based on laser-induced breakdown spectroscopy, and belongs to an optical detection technology of heavy metals. The method comprises the following steps: determining angle data of a workbench and a sample table according to elliptical light spots of two groups of light generators, then adjusting the inclination angle of the workbench, and keeping the workbench parallel to the sample table. Meanwhile, distance data between the workbench and the sample table are calculated according to the elliptical light spots, and the included angle between the first laser and the optical detector is adjusted. According to the distance between reflection points of the interference laser before and after the sample fluid is injected, thickness data of the sample fluid is predicted, and energy parameters of the second laser are adjusted. Finally, the second laser emits induction laser, and plasma signals are generated after the induction laser passes th