Research Article
Highly Sensitive Colorimetric Assay for Determining Fe3+ Based on Gold Nanoparticles Conjugated with Glycol Chitosan
Table 1
Determination of Fe3+ ions in spiked tap water, pond water, and iron supplement samples analyzed by the GC-AuNP probe and AAS.
| Amount of Fe3+ added to real samples ( = 7) | Sample | Present probe | AAS | Added amount (nM) | Detected amount (nM) | Coefficient of variation (%) | Recovery (%) | LOD (nM) | Detected amount (nM) |
| Tap water | 60.0 | 60.4 ± 0.745 | 1.23 | 100.7 ± 1.24 | 11.3 | 60.0 ± 1.00 × 10−2 | 1.80 × 102 | | 0.261 | 100.6 ± 0.262 | | Pond water | 60.0 | 60.3 ± 0.429 | 0.711 | 100.6 ± 0.715 | 29.2 | 60.0 ± 1.00 × 10−2 | 1.80 × 102 | | 0.229 | 100.1 ± 0.229 | | Iron supplement | 60.0 | 60.4 ± 0.629 | 1.04 | 100.7 ± 1.05 | 46.0 | 60.0 ± 1.00 × 10−2 | 1.80 × 102 | | 0.589 | 99.6 ± 0.587 | |
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