A Sensitive Fluorescent Immunoassay for Prostate Specific Antigen Detection Based on Signal Amplify Strategy of Horseradish Peroxidase and Silicon Dioxide Nanospheres

Table 2

Comparison results of serum samples using the proposed and ELISA method.

Serum sample	Proposed method^a (ng·mL^−1)	ELISA^a (ng·mL^−1)	Relative deviation (%)
1	1 0.116 ± 0.012	0.113 ± 0.008	2.65
2	2 0.308 ± 0.018	0.316 ± 0.014	−2.53
3	0.653 ± 0.011	0.689 ± 0.015	−5.22
4	1.152 ± 0.009	1.138 ± 0.021	1.23
5	5.210 ± 0.025	5.002 ± 0.034	4.16
6	15.262 ± 0.138	14.806 ± 0.112	3.08
7	24.139 ± 0.165	25.418 ± 0.104	−5.03
8	43.615 ± 0.213	42.221 ± 0.226	3.30

^aMean value ± SD of five measurements serum sample.