Underwater micro-plastic sampling concentration calculation system

The invention provides an underwater micro-plastic sampling concentration calculation system, which belongs to the technical field of underwater micro-plastic sampling and consists of a water pump, a black tube and a control chip. Six filter screens are sequentially arranged in the black tube, and the apertures of meshes are gradually reduced. Two chambers are formed among the fourth filter screen, the fifth filter screen and the sixth filter screen, a carbon dioxide generator is arranged in the first chamber, and carbon dioxide enters the first chamber. The second cavity is provided with a plurality of groups of laser transceivers, and the laser sensors send received laser signals to the control chip. An underwater micro-plastic concentration calculation module is arranged in the control chip, and the concentration of micro-plastic in water is calculated according to signals of the laser sensor and output parameters of the water pump. The laser emitters emit lasers of different colors. The device can monitor