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Ma Y, Jin X, Yang J, Deng Z, Bai H, Li Y, Zhou H, She M, Chen W. High sensitivity for detecting trace Sn 2+ in canned food using novel covalent organic frameworks. Talanta 2023; 257:124338. [PMID: 36796172 DOI: 10.1016/j.talanta.2023.124338] [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: 11/30/2022] [Revised: 02/04/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
Tin (Sn) element plays a vital role in the human body, and its detection is a mandatory inspection item for canned food. The application of covalent organic frameworks (COFs) in fluorescence detection has received extensive attentions. In this work, we designed a kind of novel COFs (COF-ETTA-DMTA) with high specific surface area (353.13 m2/g) by solvothermal synthesis using 2,5-dimethoxy-1,4-dialdehyde and tetra (4-aminophenyl) ethylene as precursors. It shows fast response time (about 50 s), low detection limit (228 nM) and good linearity (R2 = 0.9968) for the detection of Sn2+. Via coordination behavior, the recognition mechanism of COFs toward Sn2+ was simulated and verified by the small molecule with the same functional unit. More importantly, this COFs was successfully applied to identify Sn2+ in solid canned food (luncheon pork, canned fish, canned red kidney beans) with satisfactory results. This work provides a new approach for determining metal ions with COFs taking the advantage of their natural rich reaction set and specific surface area, improving the detection sensitivity and capacity.
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Affiliation(s)
- Yiting Ma
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China
| | - Xilang Jin
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China.
| | - Jin Yang
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China
| | - Zhifeng Deng
- National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology, School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, PR China
| | - Haiyan Bai
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China
| | - Yulong Li
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China
| | - Hongwei Zhou
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China
| | - Mengyao She
- Ministry of Education Key Laboratory of Resource Biology and Modern Biotechnology in Western China, The College of Life Sciences, Northwest University, Xi'an, Shaanxi Province 710069, PR China.
| | - Weixing Chen
- Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China.
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Hu Q, Li L, Wang Y, Zhao W, Qi H, Zhuang G. Construction of WCB-11: a novel phiYFP arsenic-resistant whole-cell biosensor. J Environ Sci (China) 2010; 22:1469-1474. [PMID: 21174981 DOI: 10.1016/s1001-0742(09)60277-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The prediction and assessment of environmental pollution by arsenic are important preconditions of advocating environmental protection and human health risk assessment. A yellow fluorescent protein-based whole-cell biosensor for the detection of arsenite and arsenate was constructed and tested. An arsenic-resistant promoter and the regulatory gene arsR were obtained by PCR from the genome of Escherichia coli DH5alpha, and phiYFP was introduced into E. coli DH5alpha as a reporter gene to construct an arsenic-resistant whole-cell biosensor (WCB-11) in which phiYFP was expressed well for the first time. Experimental results demonstrated that the biosensor has a good response to arsenic and the expression of phiYFP. When strain WCB-11 was exposed to As3+ and As5+, the expression of yellow fluorescence was time-dependent and dose-dependent. This engineered construct is expected to become established as an inexpensive and convenient method for the detection of arsenic in the field.
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Affiliation(s)
- Qing Hu
- Department of Environmental Bio-Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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