No;Sample;"Chromogenic reagent";"Signal readout";"Color change";LoD;Ref.
1;Water;"Boronic acid-functionalized MoS2 QDs";"Fluorescence (under UV lamp by naked eye)";"Blue fluorescence";"1.8 nmol/L";"(Guo et al. 2020)"
2;Soil;"Nitric acid, sulfuric acid, deionized water";"Microfluidic paper-based analytical devices (µPADs)";"Analysis was done using software";"50–350 mg L−1";"(Nashukha et al. 2021)."
3;"River water";"AgNPs (AgNO3 with ascorbic acid as a reductant)";"Smartphone application";"Yellowish brown to colorless";"0.86 ppb";"(Firdaus et al. 2019)"
4;Water;"SERS-Active peroxidase-like Au@AgPt NPs";"Colorimetric /SERS dual-mode detection";"Colorless to blue";"0.52 μM by naked eye 0.28 nM by SERS";"(Song et al. 2020)"
5;Water;"Ag NPs-tryptophan nanoconjugate functionalized with 3-(trimethoxysilyl) propyl methacrylate (TMPM)";UV-Vis;"Yellow to colorless";"2 nM";"(Balasurya et al. 2020)"
6;Water;"Achillea wilhelmsii-mediated AgNPs (Aw-AgNPs)";"Smartphone application";"Brown to colorless";"0.30 × 10−6 M";"(Mavaei et al. 2021)"
7;Water;"Green tea-mediated AgNPs";UV-Vis;"Brown to colorless";–;"(Prema et al. 2022)"
8;"Face cream";"AgNPs-C. canephora fruit skin extract";UV-Vis;"Dark brown to colorless";"0.039 mg/L";"(Sulistyart et al. 2023)"
9;Water;"Green tea-mediated AgNPs";UV-Vis;"Brown to colorless";"0.01 mg/L";"(Patra et al. 2023)"
10;Water;"Bromelain enzyme (brn-AuNPs)";"Image analysis";"Red to blue";"0.011 ppm";"(Suhaidi et al. 2023)"
11;Water;"Cyanuric acid (CA-AuNPs)";"Visual and/or ImageJ software";"Pink to bluish purple";"0.05 µM";"(Saputri et al. 2023)"