Bridging device between extraction column and liquid sample

The utility model relates to a bridging device between an extraction column and a liquid sample, which is structurally characterized in that one end of a rubber tube is sleeved with a plugging head for sealing a port of a solid-phase extraction column, the other end of the rubber tube is connected to one side of an interlayer filter, the other side of the interlayer filter is connected with a plastic hard tube, the end part of the plastic hard tube is connected with a filter head, and the other end of the plastic hard tube is connected with the liquid sample. The set length of the plastic hard tube enables the filter head to be inserted into the bottom end of a sample bottle, and the rubber tube is sleeved with a flow regulator for controlling the flow of liquid in the rubber tube. According to the utility model, good sealing connection between the sample bottle and the solid-phase extraction column can be realized, and the operation step of manually adding a liquid sample is omitted in the extraction process