Table 1. Comparison of analytical data of different methods for the detection of dopamine.

Method	Linear range (nM)	Detection limit (nM)	References
Electrochemistry detection	5–1000	1	22
Fluorescence detection	10–20 000	1.8	23
Fluorescence detection	10–1000	10	24
Colorimetric detection	10–1000	10	24
Colorimetric detection	1000–10 000	109	25
Fluorescence detection	0.1–10 000	0.02	26
BSA-Cu NCs-based fluorescence detection	500–50 000	280	27
BSA-Cu NPs-based fluorometric detection	10–60 000	5	This study
BSA-Cu NPs-based colorimetric detection	10–10 000	5	This study