A novel microfluidic surface-based competition immunoassay, termed the concentration gradient immunoassay (CGIA, explained in detail inside a friend paper1) uses surface plasmon resonance (SPR) imaging to rapidly measure the concentration of small molecules. confirms the experimental finding that the position within the microchannel at which the antibody binds to the immobilized analyte may be used… Continue reading A novel microfluidic surface-based competition immunoassay, termed the concentration gradient immunoassay