Solid-phase extraction column-passing flow aid

The utility model discloses a column-passing flow aid for solid-phase extraction. The device is characterized by comprising a rubber balloon positioned at the upper end and used for pressurizing and supplying air, a hollow connecting pipe positioned at the lower end and used for connecting a small solid-phase extraction column, and a breather pipe used for communicating the rubber balloon with thehollow connecting pipe, an air inlet pipe is arranged on the side wall of the breather pipe; a first one-way valve used for controlling external air to enter the vent pipe is arranged in the air inlet pipe, and a second one-way valve used for controlling airflow to enter the hollow connecting pipe from the rubber balloon is arranged in the vent pipe and located below the air inlet pipe. The solid-phase extraction device has the advantages of being capable of increasing the purification speed of solid-phase extraction, simple in structure, convenient to operate and capable of effectively preventing suck-back. 本实用新型公开了