Portable chromatographic column with novel structure

The utility model discloses a portable chromatographic column with a novel structure, which comprises a column body, and a buoyancy movable plug cavity is arranged at the top inside the column body. According to the utility model, a brand-new structure of the buoyancy plug is added on the basis of the original column body; the top of the buoyancy plug is embedded into the air vent in the top of the column body; thus, when liquid is pumped into the liquid inlet, the pump is started; a cavity of the buoyancy movable plug is filled with liquid; buoyancy plug for blocking air outlet, the whole column body forms a closed space; controlling flow rate by a pump, when air is pumped into the liquid inlet; the liquid level in the cavity of the buoyancy movable plug descends; buoyancy plug descent, vent opening, the sand core sheet structure is arranged at the bottom of the cavity of the buoyancy movable plug, so that the liquid level can be kept not to descend any more, the air is prevented fromentering the chromatogra