中文摘要：

以纳米金粒子为载体，将硫普罗宁修饰至其表面形成硫普罗宁修饰的纳米金溶液（MPG-AuNPs），实现对铜离子的比色检测。系统研究了pH和时间等因素对比色检测的影响，考察了该比色传感器检测铜的灵敏度与线性范围，探究了环境中常见离子对体系的干扰。结果表明，在pH5．0时，响应时间为30min时，纳米粒子MPG—AuNPs对Cu2＋的检出限0．97μmol·L-1，K＋，Na＋，Sr2＋，Cs＋，Hg2＋，Co2＋，Ni2＋等离子的存在对Cu2＋的比色检测无影响。

英文摘要：

alized gold gregated in A simple and selective colorimetric sensor based on N-（2-Mercaptopropionyl） glycine （MPG）-function- nanoparticles （MPG-AuNPs） has been developed for the detection of Cu2＋. MPG-AuNPs rapidly ag- the presence of Cu2＋ , thereby causing a visual color change from red to blue, which is easily detecta- ble by eye or a UV-vis spectrophotometer. The absorbance ratio （A650/A524 ） was linear with the Ca2＋ concentra- tion. Under optimum condition （ pH 5.0）, the detection limit of Cu2 ＋ was 0. 97 μmol · L -1 （ S/N = 3 ）. The pro- posed sensing system possesses a selective response for Cu2＋ over other heavy metal ions.