“…After which, target analyte is passed through the membrane, and the displacement of labeled antigen is monitored downstream. This method has been successfully applied to the detection of numerous hapten molecules and satisfactory sensitivity have been obtained: 10pM for thyroxine (Arefyev et al, 1990); 20 pM for -(difluoromethyl) ornithine (Gunaratna et al, 1993) and 40pM for digoxigenin (Lovgren et al, 1997). The most inviting advantage of this method is the ability to realize automatic detection.…”