Figure 2: QCM sensorgram by immobilization of sIL-6R (2) - (4) and adsorption of IL-6 (6) - (8). Response (1) is at the equilibration and a stabilized baseline after the addition of PBS. Response (2) to (3) is buffer washing to remove unreacted sIL-6R. Response (4) is the blocking of noncoupled activated NHS-esters with ethanolamine. Response (5) is buffer washing to remove ethanolamine. Response (7) is buffer washing to remove unreacted IL-6 (8) corresponds to ΔF