| CRP-antigen concentrations | 5 ng∙mL−1 | 10 ng∙mL−1 | 100 ng∙mL−1 |
| SPRi signal in human plasma without protein G | No detected | 4.7 pixels | 12.8 pixels |
| SPRi signal in human plasma with protein G | 3.8 pixels | 9.1 pixels | 21.7 pixels |