Highly Sensitive Immunosensing of Carcinoembryonic Antigen Based on Gold Nanoparticles Dotted PB@PANI Core-Shell Nanocubes as a Signal Probe

Table 2

Comparison with ELISA for CEA.

Serum sample no.	This method (ng·mL^−1)	ELISA^a (ng·mL^−1)	RSD (%)
1	0.06 ± 0.01	0.058 ± 0.02	+3.45
2	0.54 ± 0.12	0.57 ± 0.08	−5.26
3	1.88 ± 0.14	1.85 ± 0.05	+1.62
4	5.00 ± 0.22	5.14 ± 0.13	−2.72
5	13.26 ± 0.42	13.76 ± 0.57	−3.63
6	18.78 ± 1.23	17.56 ± 1.65	+6.94
7	23.55 ± 1.09	24.06 ± 0.79	−2.12
8	37.67 ± 0.78	36.87 ± 1.52	+2.17
9	50.33 ± 1.77	52.26 ± 0.67	−3.69
10	78.38 ± 1.39	75.97 ± 1.83	+3.17

^aMean value ± SD of five measurements.