Carbon Material Hybrid Construction on an Aptasensor for Monitoring Surgical Tumors

Figure 6

Limit of detection of CEA in PBS and human serum. Similar concentrations of CEA were diluted in PBS and human serum and detected on an anti-CEA aptamer-constructed IDE sensor. The difference in the response (from blank) was plotted by a linear regression graph. The limit of detection for CEA is found to be 0.5 ng/mL in both PBS and serum-spiked samples. Figure insets show the diagrammatical representations.