A promising method based on surface plasmon resonance for quantitative analysis of biological samples

Abstract

Surface plasmon resonance (SPR) technique is based on an optical measurement approach that is highly sensitive to the refractive index unit (RIU) of the sample on its analysis surface. Here, we demonstrate the direct detection of proteins and small molecules using an advanced SPR technology with a sensitivity that is as good as Fourier transform infrared (FTIR) spectroscopy. Some quantitative results are reported in this paper.