The present invention is directed to a device for removing magnetic particles from a liquid, the device comprising at least one container for holding a liquid containing magnetic particles； and at least one magnetic column for placing into the at least one container, wherein when the liquid comes into contact with the at least one magnetic column, the magnetic particles are attracted towards, and bind to, the at least one magnetic column such that when the liquid is separated from the at least one magnetic column, the magnetic particles are removed from the liquid.
