A Novel Sandwich Electrochemical Immunosensor Based on the DNA-Derived Magnetic Nanochain Probes for Alpha-Fetoprotein

Table 2

Results for determination of AFP in human serum comparing with ELISA (𝑛=3).

Sample	AFP concentration (ng/mL)
	This method	ELISA	Added	Found	Recovery %^a
1	5.32	5.18	5.0	10.2	97.6
2	9.74	10.3	9.0	18.3	95.1
3	20.52	21.3	20.0	40.7	100.9

^aRecovery=100%∗(found−thismethod)/added.