摘要
通过对银/铂纳米簇(Ag/Pt NCs)的表面修饰调控其催化活性,建立了一种高灵敏的比色法检测Cu^(2+)。巯基丙酸能够抑制Ag/Pt NCs的催化活性,而巯基丙酸与Cu^(2+)作用后,将导致上述抑制作用减弱。基于上述原理,通过测量Ag/Pt NCs催化TMB-H_2O_2反应产生的显色信号,可以实现Cu^(2+)的比色检测。本方法检测Cu^(2+)的线性范围为10~100 nmol/L,检出限(3σ)为5.0 nmol/L。将本方法应用于实际水样中Cu^(2+)的检测,结果表明,本方法具有操作简单、成本低、灵敏度高、特异性好等优点。
A sensitive colorimetric method for the detection of copper ions(Cu2+)was developed based on thesurface modification of silver/platinum nanoclusters(Ag/Pt NCs)and regulation of peroxidase-like activity.Itwas found that3-mercaptopropionic acid(MPA)could inhibit the catalytic ability of Ag/Pt NCs;however,itlost the inhibition toward catalytic ability of A^^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 thecolorimetric signal variation of the TMB-H2O2reaction.This method exhibited high sensitivity and selectivitytoward Cu2+over a panel of other metal ions.The linear range was10-100nm ol/L and the detection lim it was5.0nm ol/L(3滓).The above method was also applied to detect real water samples and spiked samples,andthe results demonstrated that this method was simple with low cost.
作者
吴亮亮
钱志娟
谢正军
张莹莹
彭池方
WU Liang-Liang;QIAN Zhi-Juan;XIE Zheng-Jun;ZHANG Ying-Ying;PENG Chi-Fang(State Key Laboratory o f Food Science and Technology,School o f Food Science and Technology, Jiangnan University, Wuxi 214122, China;Yangzhou Entry-Exit Inspection and Quarantine Bureau , Yangzhou 225000, China)
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2017年第4期471-476,共6页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金(No.31371767)
十二五国家科技支撑计划项目(No.2015BAD17B02)
江苏省出入境检验检疫局科技项目(No.2017KJ19)资助~~
关键词
银祐纳米簇
比色检测
巯基丙酸
铜离子
Silver/platinum nanoclusters
Colorimetric detection
3-Mercaptopropionic acid
Copper ions
