Continuous Electrochemical Detection of Gold Nanoparticles in Flow
Continuous Electrochemical Detection of Gold Nanoparticles in Flow
复制标题
流动中金纳米粒子的连续电化学检测
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
M. Opallo
中科院分区：
文献类型：
--
作者：
D. Ogończyk;M. Gocyla;T. Andryszewski;M. Opallo
纳米颗粒已经有了许多应用，其全球产量仍在增加。因此，不确定毒性的工程纳米物体在环境中变得无处不在，并且非常需要对其存在的连续监测。在这里，我们展示了一个连续的电化学检测的金纳米粒子（AuNPs）的基础上，其电溶解和电催化的同步过程。这种方法是通过将纳米颗粒悬浮液注入流动注射分析（FIA）系统来实现的。FIA系统的模块化结构特别适用于执行顺序操作：AuNPs钝化，含水SO2和金的氧化。它可以在宽浓度范围内连续、快速和可重现地测定金纳米粒子：10−10- 10−7 mol nanobarts L−1。
Nanoparticles have already found numerous applications and their global production is still increasing. Therefore, the engineered nanoobjects of uncertain toxicity become ubiquitous in the environment and a continuous monitoring of their presence is highly desirable. Here, we demonstrate a continuous electrochemical detection of gold nanoparticles (AuNPs) based on synchronous processes of their electrodissolution and electrocatalysis. This approach is realized by the injection of nanoparticles suspension into the Flow Injection Analysis (FIA) system. The modular structure of FIA system is particularly applicable for carrying out of sequential operations: AuNPs passivation, oxidation of aqueous SO2 and gold. It enables continuous, fast and reproducible gold nanoparticles determination in a wide concentration range: 10−10– 10−7 mol nanoobjects L−1.