. 2022 May 28;248:123605. doi: 10.1016/j.talanta.2022.123605

Table 2.

Comparison of other reported methods for the SARS-CoV-2 spike protein analysis.

Methods	linear rang	LOD	Ref.
Carbon magnetic beads-based electrochemical immunosensor	40 ng·mL⁻¹–10 μg·mL⁻¹	14 ng·mL⁻¹	[15]
Nanozyme-based chemiluminescence immunoassay	0.2 ng·mL⁻¹–100 ng·mL⁻¹	0.1 ng·mL⁻¹	[16]
Fiber-optic label-free biosensor	1 pg·mL⁻¹–100 μg·mL⁻¹	_	[17]
Field-effect transistor-based electrical immunosensor	_	100 fg·mL⁻¹	[18]
Aptamer binding-induced multiple hairpin assembly-based electrochemical aptasensor	50 fg mL⁻¹∼ 50 ng mL⁻¹	9.79 fg mL⁻¹	This work