Comparison of TC determination using different methods.

Analytical method	Target	Linear range (nM)	LOD (M)	Ref.
Capillary electrophoresis	TC		2.00 × 10−8	8
HPLC	TC		10−6	54
Colorimetric analysis	TC	0.3–10	2.660 × 10−10	9
ELISA	TC	0.225–2250	2.200 × 10−10	55
Fluorescence	TC	0.001–0.4	6.000 × 10−6	56
Fluorescence	TC	3000–3.5 × 10−4	1.200 × 10−8	57
Fluorescence	TC	0.25–5000	9.375 × 10−13	This work