Degassing device and method for online liquid flash

The invention discloses a degassing device and method for on-line liquid flash, and relates to the field of radionuclide measurement, the device comprises a degassing tank, a sieve pore adsorption layer and a diaphragm pump, an inner cavity of the degassing tank is divided into a first area and a second area, the degassing tank is externally connected with a liquid inlet pipe communicated with the first area, the degassing tank is externally connected with a material film pipe communicated with the second area, and the material film pipe is connected with the sieve pore adsorption layer. The material film pipe is used for being connected with a scintillation liquid storage tank; the sieve pore adsorption layer is arranged in the second area, and the exhaust end of the diaphragm pump is connected with the outer wall of the degassing tank and communicated with the first area; the first area is a vacuum area, and the second area is a solution area; the method is realized by using the device. The degassing device