A Fluorimetric Method Based on an Imidazole Compound for Cu²⁺ Determination in Tap Water

Table 3

Detection limits of fluorimetric Cu²⁺ determination methods in tap water.

Reagent	LOD	Reference
Schiff base	0.1 nM	[30]
N-CQDs	0.09 μM	[31]
PVA/CdS QDs	0.12 nM	[32]
CA-CdS QDs	9.2 × 10^–9 M	[33]
Coordination polymer	3.0 μM	[34]
Fe3O4@SiO2-NH2-morin	7.5 nM	[35]
DPA-capped CdTeQDs	0.4 × 10^–9 M	[36]
AuNCs	0.33 nM	[37]
AuNCs	0.9 μM	[38]
CuNCs core/shell NPs	1.3 ppm	[39]
CuNPs	5.6 μM	[40]
CdTeQDs	1.55 × 10^−8 M	[41]
CdSe/ZnSQDs	0.14 nM	[42]
Fe3O4-MOFs	0.1 nM	[43]
Fe3O4@SiO2	6 nM	[44]
Porous silicon NPs	0.1 µM	[45]
SrF2 nanocrystals	2 nM	[46]
Imidazole compound	0.28 μg/L	This study