Table 2.

Comparison of various biosensors for detecting BSA

BSA detection sensitivity	Frequency shift (GHz)/lowest concentration (mg/mL)	Limit of detection (mg/mL)	Wavelength band (THz)	References
1.43 GHz/(mg/ml)	50/49.8	1.18	1.0–1.7	[45]
–	2/0.1	–	0.6–1.0	[46]
–	300, 400/9	–	0.1–1.4	[47]
72.81 GHz/(ng/mm2)	10.8/0.2	0.035	0.2–0.7	This work