Water quality sampling device for heavy metal detection

The invention discloses a water quality sampling device for heavy metal detection, and belongs to the field of water quality detection. According to the device, through the combination of the water quality sample feeding unit, the zinc plate transmission and evaporation drying unit, the zinc plate position updating unit and the control unit, full-automatic treatment of a water sample is realized, manual intervention is not needed, and the detection efficiency and accuracy are greatly improved. Specifically, a to-be-detected water body is converted into a liquid drop form through the water quality sample sending unit, a water sample is dropwise added to the surface of a zinc coil, and then the liquid drops are treated by utilizing the zinc plate transmission and evaporation drying unit, so that the removal of a water matrix is realized, and the strength and the stability of an LIBS signal are remarkably improved; compared with manual processing in related technologies, the full-automatic sampling device has th