Research Article
Highly Sensitive Colorimetric Assay for Determining Fe3+ Based on Gold Nanoparticles Conjugated with Glycol Chitosan
Table 3
Comparison of present probe with previously reported nanoparticle assay methods for the analysis of Fe3+.
| Detection tool | Functionalized agent | Sensing method | LDR | LOD | Ref |
| Chemosensor | 2-Chloro-N-(9-ethyl-9H-carbazol-3-yl)acetamide and 2-(((pyridin-2-ylmethyl)amino)methyl) phenol | Color change | — | 13.5 μM | [14] | Chemosensor | 2-(Aminomethyl)benzimidazole dihydrochloride and 4-diethylaminosalicylaldehyde | Color change | 0–5.0 μM | 1.21 μM | [15] | Chemosensor | 5-Amino-1H-imidazole-4-carboxamide and 8-hydroxyjulolidine-9-carboxaldehyde | Fluorescence | — | 0.27 μM | [16] | Cu nanoclusters | Polyethylenimine | Fluorescence | 0.5–1000 μM, | 0.34 μM | [19] | Au nanoclusters | L-3,4-Dihydroxyphenylalanine | Fluorescence | 5–1280 μM | 3.5 μM | [20] | AgNPs | N-Acetyl-L-cysteine | Color change (etching) | 80 nM–80 mM | 80 nM | [21] | Au nanorods | Label-free | Color change (etching) | — | 1.79 μM | [22] | Graphene quantum dots | 1-Butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6) | Fluorescence | 0–80 µM | 7.22 µM | [23] | Carbon dots | label-free | Fluorescence | 0–20 μM. | 0.32 μM | [24] | AgNPs | Calix[4] resorcinarene polyhydrazide | Fluorescence | 0.1–10 μM | 0.1 μM. | [25] | AuNPs | Pyrophosphate | Color change (aggregation) | 10–60 μM | 5.6 μM. | [26] | AuNPs | Histidine | Color change (aggregation) | — | — | [27] | AuNPs | p-Amino salicylic acid dithiocarbamate | Color change (aggregation) | 40–80 mM | 14.82 nM | [28] | AuNPs | Glycol chitosan | Color change (aggregation) | 0.0–180 μM | 11.3 nM | This work |
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LDR; linear dynamic range; LOD; limit of detection.
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