摘要
金核铂壳纳米粒子(Au@Pt NPs)具有出色的类过氧化物酶活性,而Ag^+对其催化活性表现出强烈的抑制;基于此,构建了高灵敏的Ag^+比色检测方法。在最佳反应条件下,Au@Pt NPs比色检测Ag^+的线性范围为0.1~10 nmol/L,检出限可达0.05 nmol/L。该方法对汞离子(Hg2^+)也表现出高灵敏的响应,比色检测Hg2^+的线性范围为10~200 nmol/L。将其应用于实际水样中Ag^+的检测,在添加浓度为10,50,100 nmol/L时,回收率为83.8%~97.7%,相对标准偏差为3.0%~9.6%,该方法具有操作简单、灵敏度高、成本低等优点。
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 nmolfL） , 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.
出处
《分析测试学报》
CAS
CSCD
北大核心
2016年第11期1496-1499,1504,共5页
Journal of Instrumental Analysis
基金
十二五国家科技支撑计划项目(2015BAD17B02)
国家自然科学基金资助项目(31371767)
