Continuous online detection method of heacy metals in water based on LIBs technology

In order to meet the requirement of in-situ online monitoring of heavy metals in industrial wastewater, a new method based on laser induced breakdown spectroscopy (LIBS) was proposed to continuously monitor heavy metals in water Line detection method The enrichment method of graphite substrate evaporation is adopted, and the enrichment mode of sample solution, quantitative addition mode of sample solution, and evaporation enrichment mode of sample solution are studied, It has realized the rapid automatic detection of heavy metal elements in water, improved the detection efficiency and detection capability The calibration curves of these six elements were established and the corresponding detection limits were obtained The relative standard deviation of spectral intensity is 9.24%, 10.45%, 12.59%, 11.58%, 15.24%, 6.87% respectively, and the detection limits are 0.03, 0.012 0.0047、0.033、0.071、0.0376 mg/L.。