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. 2023 Nov 4;9(11):e21850. doi: 10.1016/j.heliyon.2023.e21850

Table 2.

Comparison of LOD of ZnS@β-CD NPs with published colorimetric sensors for detecting Pb2⁺, Cu2⁺, and Hg2⁺ metal ions.

Quantitaive method Metal ion Sensor LOD References
AuNP 1.8 μM 51
AuNP 2.5 μM 52
Pb2 AgNP 1 μM 53
ZnS NP 1 μM 21
ZNS NP 1 μM Proposed method
Colorimetry ZnS NP 1.24 μM 54
AuNP 0.5 μM 55
Cu2 AgNP 2.9 μM 56
ZnS NP 10 μM 21
ZnS NP 10 μM Proposed method
AuNP 3 μM 52
AgNP 11.17 μM 53
Hg2 CdSe/ZnS QD 0.09 μM 57
ZnS NP 1 μM 21
ZnS NP 1 μM Proposed method