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Wang S, Wang Y, Ma J, Huang C, Chen L. Portable smartphone-assisted highly sensitive detection of mercury ions based on gold nanoparticle-modified NH 2-UiO-66 metal-organic framework. Anal Bioanal Chem 2024; 416:1001-1010. [PMID: 38097760 DOI: 10.1007/s00216-023-05090-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/16/2023] [Accepted: 12/04/2023] [Indexed: 01/23/2024]
Abstract
A novel portable smartphone-assisted colorimetric method was reported for the determination of Hg2+ with good analytical performance. A Zr(IV)-based metal-organic framework functionalized with amino groups (NH2-UiO-66) has been adopted as a supporting platform to anchor gold nanoparticles (AuNPs), avoiding the migration and aggregation of AuNPs. With the addition of Hg2+, the formation of gold amalgam proved possible to enhance peroxidase-like activity of the composite (AuNPs/NH2-UiO-66), accelerating the oxidization of zymolyte 3,3',5,5'-tetramethylbenzidine (TMB). In the meantime, the color of the reaction solution turned a vivid blue, and the red, green, and blue (RGB) values of the solution color changed accordingly. On account of this strategy, the quantitative detection of Hg2+ could be achieved. After the optimization of the experiment conditions, the average color intensity (Ic) resulting from RGB values was linear related to the concentration of Hg2+ from 10 to 100 nM, accompanied with a detection limit (LOD) down to 5.4 nM calculated by 3σ/S. The successful application of the designed method has been promoted to detect Hg2+ in some water samples, displaying a great potential in practical application. Furthermore, the use of a smartphone made our proposed method simple and accurate, and thus puts forward a possible way for in situ and real-time monitoring.
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Affiliation(s)
- Shasha Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Yifei Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Jiping Ma
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China.
| | - Chaonan Huang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Shandong Research Center for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China.
- School of Pharmacy, Binzhou Medical University, Yantai, 264003, China.
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China.
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Yin B, Zhou R, Guo Z, Sun J, Zhu J, Wang Z, Ma C, Zhang M. A Smartphone-Based Sensing for Portable and Sensitive Visual Detection of Hg (II) via Nitrogen Doped Carbon Quantum Dots Modified Paper Strip. J Fluoresc 2023:10.1007/s10895-023-03439-1. [PMID: 37721706 DOI: 10.1007/s10895-023-03439-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 09/11/2023] [Indexed: 09/19/2023]
Abstract
The development of portable and cost-effective sensing system for Hg2+ quantitation is highly demanded for environmental monitoring. Herein, an on-site, rapid and portable smartphone readout device based Hg2+ sensing system integrating nitrogen-doped carbon quantum dots (NCDs) modified paper strip was proposed, and the physicochemical properties of NCDs were characterized by high resolution TEM, FTIR, UV-vis absorption spectrum and fluorescence spectral analysis. The modified paper strip was prepared via "ink-jet" printing technology and exhibits sensitive fluorescence response to Hg2+ with fluorescence color of bright blue (at the excitation/emission wavelength of 365/440 nm). This portable smartphone-based sensing platform is highly selective and sensitive to Hg2+ with the limit of detection (LOD) of 10.6 nM and the concentration range of 0-130 nM. In addition, the recoveries of tap water and local lake water were in the range of 89.4% to 109%. The cost-effective sensing system based on smartphone shows a great potential for trace amounts of Hg2+ monitoring in environmental water samples.
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Affiliation(s)
- Bo Yin
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China.
- Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing, Normal University, Xining, 810016, China.
| | - Rongping Zhou
- Student Career Center of Qinghai Normal University, Xining, 810008, People's Republic of China
| | - Zhonglong Guo
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China
| | - Jing Sun
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China
| | - Jihua Zhu
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China
- Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing, Normal University, Xining, 810016, China
| | - Zhenbin Wang
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China
- Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing, Normal University, Xining, 810016, China
| | - Cunhua Ma
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China
- Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing, Normal University, Xining, 810016, China
| | - Mingjin Zhang
- College of Chemistry & Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China.
- Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing, Normal University, Xining, 810016, China.
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Chen H, Li X, Gao P, Pan Y, Liu J. A BODIPY-based turn-off fluorescent probe for mercury ion detection in solution and on test strips. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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