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| Colorimetric Detection of Silver Ions Based on Au@Pt Nanoparticles |
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| DOI： |
| KeyWord:Au@Pt nanoparticles enzyme mimics colorimetric detection Ag+ Hg2+ |
| Author | Institution |
| CHEN Ming-ming，WU Liang-liang，XIE Zheng-jun，PENG Chi-fang* |
江南大学食品学院食品科学与技术国家重点实验室 |
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| Abstract: |
| Au@Pt NPs have an excellent peroxidase like activity，and silver ions(Ag+) could intensively inhibit the catalytic ability of Au@Pt NPs.Based on this，a colorimetric detection of Ag+ was performed in a linear range of 0.1- 10 nmol/L with a detection limit of 0.05 nmol/L.The sensing system also showed a sensitive response to Hg2+.A linear range of 10-200 nmol/L and a detection limit of 5.0 nmol/L were achieved in the colorimetric detection for Hg2+.The method was applied in detection of tap water spiked with Ag+(10，50,100 nmol/L)，and the recoveries ranged from 83.8% to 97.7% with relative standard deviations(RSD) of 3.0%-9.6%.This method has the advantages of simplicity，sensitivity and low cost. |
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