Research Article
Oxidase-Like Catalytic Performance of Nano-MnO2 and Its Potential Application for Metal Ions Detection in Water
Table 1
Analytical results for the detection of metal ion-contaminated water samples by MnO2 nanozyme-2,6-DMP detecting systems.
| | Real samples | Added Cu2+ (mmol·L−1) | Detected Cu2+ (mmol·L−1) | Recovery | RSD (n = 5) | Added Zn2+ (mmol·L−1) | Detected Zn2+ (mmol·L−1) | Recovery | RSD (n = 5) | Added Mn2+ (mmol·L−1) | Detected Mn2+ (mmol·L−1) | Recovery | RSD (n = 5) | Added Fe2+ (mmol·L−1) | Detected Fe2+ (mmol·L−1) | Recovery | RSD (n = 5) |
| | Pond water 1 | 0.002 | 0.002 | 104.8% | 6.9% | 0.002 | 0.002 | 108.6% | 7.3% | 0.002 | 0.002 | 106.7% | 5.4% | 0.002 | 0.002 | 116.5% | 13.2% | | 0.01 | 0.010 | 101.1% | 3.7% | 0.01 | 0.013 | 111.2% | 10.5% | 0.01 | 0.009 | 98.6% | 6.3% | 0.01 | 0.011 | 114.9% | 8.8% | | 0.05 | 0.052 | 105.8% | 5.4% | 0.05 | 0.051 | 102.7% | 3.8% | 0.05 | 0.053 | 106.1% | 7.4% | 0.05 | 0.056 | 111.9% | 26.1% | | 0.25 | 0.253 | 106.6% | 4.9% | 0.25 | 0.0248 | 97.8% | 4.3% | 0.25 | 0.255 | 112.4% | 11.2% | 0.25 | 0.246 | 96.6% | 12.0% |
| | Pond water 2 | 0.002 | 0.002 | 106.9% | 9.8% | 0.002 | 0.002 | 95.0% | 6.7% | 0.002 | 0.002 | 106.5% | 6.3% | 0.002 | 0.002 | 110.5% | 15.7% | | 0.01 | 0.009 | 93.0% | 11.2% | 0.01 | 0.013 | 111.2% | 5.3% | 0.01 | 0.012 | 124.0% | 11.8% | 0.01 | 0.011 | 114.3% | 8.6% | | 0.05 | 0.054 | 108.6% | 7.6% | 0.05 | 0.052 | 104.4% | 4.2% | 0.05 | 0.047 | 94.5% | 4.9% | 0.05 | 0.048 | 97.2% | 7.3% | | 0.25 | 0.248 | 99.4% | 3.3% | 0.25 | 0.246 | 98.5% | 3.1% | 0.25 | 0.254 | 101.7% | 2.2% | 0.25 | 0.252 | 100.9% | 3.5% |
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