High-tightness high-stability gas trap device

The utility model discloses a high-tightness high-stability gas trap device which comprises a bottle (1) and a seal plug (2). The seal plug (2) is provided with a gas inlet guide tube (3) and a gas outlet tube (7), the gas inlet guide tube (3) is connected with a gas inlet tube (5), the end of the gas inlet tube (5) is provided with a gas filter head (6), the bottle (1) and the seal plug (2) are in elastic and/or plastic deformation structures and closely matched with each other, and a check valve (4) is arranged between the gas inlet guide tube (3) and the gas inlet tube (5). Compared with the prior art, the high-tightness high-stability gas trap device which adopts the trap bottle made of materials in the elastic and/or plastic deformation structure has the advantage that tightness and stability are greatly improved. Trapping efficiency is improved, dissolution rate of intrinsic heavy metal (metalloid) of the bottle body is decreased, analysis test backgrounds are reduced, and accuracy and sensitivity of an