基于以氧化N-甲基吡咯烷酮作为还原剂合成的金纳米粒子的汞比色检测。

A colorimetric detection of Hg based on gold nanoparticles synthesized oxidized N-methylpyrrolidone as a reducing agent.

作者信息

Shao Xiaodong, Yang Dou, Wang Min, Yue Qiaoli

机构信息

State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi'an, 710077, China.

School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, China.

出版信息

Sci Rep. 2023 Dec 14;13(1):22208. doi: 10.1038/s41598-023-49551-x.

DOI:10.1038/s41598-023-49551-x

PMID:38097761

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10721636/

Abstract

In this study, a gold nanoparticles colorimetric probe (AuNPs) with direct response to mercury ions (Hg) were developed using treated N-methylpyrrolidone (NMP) and chloroauric acid (HAuCl) as precursors. NMP showed good reducibility after high temperature hydrolysis and could be used as reducing and stabilizing agent to synthesize AuNPs. The prepared AuNPs have obvious characteristic absorption peaks and appear wine-red. At the same time, it was found that the presence of Hg can cause the aggregation of AuNPs, increased the absorbance at 700 nm, and changed the color of the solution into blue-gray. This method is capable of sensitive and specific determination of Hg ranging from 1 to 30 μM, with the limit of detection (LOD) at 0.3 μM. The method showed good specificity for the determination of Hg and has the potential to be applied to Hg detection in sewage samples in the environment.

摘要

在本研究中，以经处理的N-甲基吡咯烷酮（NMP）和氯金酸（HAuCl）为前体，开发了一种对汞离子（Hg）有直接响应的金纳米颗粒比色探针（AuNPs）。NMP在高温水解后表现出良好的还原性，可作为还原剂和稳定剂来合成AuNPs。制备的AuNPs具有明显的特征吸收峰，呈现酒红色。同时，发现Hg的存在会导致AuNPs聚集，增加700 nm处的吸光度，并使溶液颜色变为蓝灰色。该方法能够灵敏且特异性地测定1至30 μM的Hg，检测限（LOD）为0.3 μM。该方法对Hg的测定具有良好的特异性，有潜力应用于环境污水样品中Hg的检测。