Table 1.

CDs prepared herein were compared with Cr(VI) detection performance previously reported in the literature.

Probe	Linear range (μM)	LOD (μM)	Refs.
C-dots	80–1000	140	[46]
NPS-CDs	1–500	0.23	[43]
CG-CDs	5–200	4.16	[47]
CDs	0.5–263	0.26	[48]
CCDs	5–125	1.17	[2]
CDs	1–100	0.25	This work

C-dots: carbon quantum dots; NPS-CDs: nitrogen, phosphorus, and sulfur tri-doped carbon dots; CG-CDs: carbon dots from citric acid and glycine; CCDs: cobalt(II)-doped carbon dots.