Table 3.

Determination of SARS-CoV-2 spike protein in saline solution soaked nasopharyngeal swab from healthy people with the proposed aptasensor.

Sample	Added (ng·mL−1)	Found (ng·mL−1)	Recovery (%)	RSD (%)
1	5.00 × 10	5.33 × 10	106.52	2.88
2	5.00	4.75	95.01	0.42
3	5.00 × 10−1	5.18 × 10−1	103.64	0.50
4	5.00 × 10−2	4.78 × 10−2	95.59	2.30
5	5.00 × 10−3	4.88 × 10−3	97.51	2.55
6	5.00 × 10−4	5.14 × 10−4	102.86	1.26