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基于布洛芬修饰的汞纳米粒子的高灵敏度伏安法测定丙烯酰胺。

Highly Sensitive Voltammetric Determination of Acrylamide Based on Ibuprofen Capped Mercury Nanoparticles.

机构信息

International Center for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan.

National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.

出版信息

Sensors (Basel). 2021 Nov 2;21(21):7302. doi: 10.3390/s21217302.

DOI:10.3390/s21217302
PMID:34770608
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8587918/
Abstract

Highly stable, small-sized and evenly distributed solid mercury nanoparticles capped with ibuprofen (Ibu-HgNPs) were prepared via reduction with hydrazine and capped with ibuprofen as a stabilizing agent. Characterization of Ibu-HgNPs was carried out by UV-Vis spectrophotometry and transmission electron microscopy (TEM). The prepared Ibu-HgNPs were immobilized onto a glassy carbon electrode (GCE) and used for the first time as the sensing element for voltammetric determination of low concentrations of acrylamide (AA) in aqueous solutions. Various parameters such as the type of supporting electrolyte, voltammetric mode, frequency, deposition time, stirring rate and initial potential were optimized to obtain the highest peak current of AA. The sensor delivered the best results in combination with the square wave voltammetry (SWV) mode, with good repeatability (relative standard deviation (RSD) of 25 repetitions was 1.4% for 1000 ppb AA). The study further revealed that Ibu-HgNPs are strongly adhered to GCE and hence do not contaminate the environment even after several runs. The newly developed AA sensor provides linear calibration dependence in the range of 100-1300 ppb with an R value of 0.996 and limit of detection (LOD) of 8.5 ppb. Negligible interference was confirmed from several organic compounds, cations and anions. The developed sensor was successfully applied for AA determination in various types of environmental real water samples to prove its practical usefulness and applicability.

摘要

采用水合肼还原法，以布洛芬（Ibu）为稳定剂制备了高度稳定、尺寸小且分布均匀的固态汞纳米粒子（Ibu-HgNPs）。采用紫外-可见分光光度法和透射电子显微镜（TEM）对 Ibu-HgNPs 进行了表征。将制备的 Ibu-HgNPs 固定在玻碳电极（GCE）上，并首次将其用作伏安法测定水溶液中低浓度丙烯酰胺（AA）的传感元件。优化了各种参数，例如支持电解质的类型、伏安模式、频率、沉积时间、搅拌速度和初始电势，以获得 AA 的最高峰电流。该传感器与方波伏安法（SWV）模式相结合，结果最佳，具有良好的重现性（1000 ppb AA 重复 25 次的相对标准偏差（RSD）为 1.4%）。研究进一步表明，Ibu-HgNPs 牢固地附着在 GCE 上，因此即使经过多次运行也不会污染环境。新开发的 AA 传感器在 100-1300 ppb 范围内提供线性校准依赖性，相关系数（R 值）为 0.996，检测限（LOD）为 8.5 ppb。从几种有机化合物、阳离子和阴离子中证实了可忽略的干扰。该传感器成功地应用于各种类型的环境实际水样中的 AA 测定，以证明其实际有用性和适用性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/65de2529140e/sensors-21-07302-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/cb8da432c4b9/sensors-21-07302-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/fcab1084d316/sensors-21-07302-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/21c8bd88c77b/sensors-21-07302-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/66c678bffad1/sensors-21-07302-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/e4c53d6424f3/sensors-21-07302-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/827b25db9ed3/sensors-21-07302-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/cb8c1468fc67/sensors-21-07302-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/11ca4b889bc0/sensors-21-07302-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/65de2529140e/sensors-21-07302-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/cb8da432c4b9/sensors-21-07302-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/fcab1084d316/sensors-21-07302-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/21c8bd88c77b/sensors-21-07302-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/66c678bffad1/sensors-21-07302-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/e4c53d6424f3/sensors-21-07302-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/827b25db9ed3/sensors-21-07302-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/cb8c1468fc67/sensors-21-07302-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/11ca4b889bc0/sensors-21-07302-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d459/8587918/65de2529140e/sensors-21-07302-g009.jpg

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