Colorimetric Detection of Copper Ions Based on Surface Modification of Silver/Platinum Cluster Nanoenzyme
10.11895/j.issn.0253-3820.160710
- VernacularTitle:基于银/铂纳米模拟酶表面修饰的铜离子比色检测方法研究
- Author:
Liangliang WU
;
Zhijuan QIAN
;
Zhengjun XIE
;
Yingying ZHANG
;
Chifang PENG
- Keywords:
Silver/platinum nanoclusters;
Colorimetric detection;
3-Mercaptopropionic acid;
Copper ions
- From:
Chinese Journal of Analytical Chemistry
2017;45(4):471-476
- CountryChina
- Language:Chinese
-
Abstract:
A sensitive colorimetric method for the detection of copper ions (Cu2+) was developed based on the surface modification of silver/platinum nanoclusters (Ag/Pt NCs) and regulation of peroxidase-like activity. It was found that 3-mercaptopropionic acid (MPA) could inhibit the catalytic ability of Ag/Pt NCs; however, it lost the inhibition toward catalytic ability of Ag/Pt NCs after oxidized by oxygen through the catalysis of Cu2+. On the basis of this, a colorimetric method was developed for the detection of Cu2+ through measuring the colorimetric signal variation of the TMB-H2O2 reaction. This method exhibited high sensitivity and selectivity toward Cu2+ over a panel of other metal ions. The linear range was 10-100 nmol/L and the detection limit was 5.0 nmol/L (3σ). The above method was also applied to detect real water samples and spiked samples, and the results demonstrated that this method was simple with low cost.
