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Li B, Dai Y, Shi C, Guo X, Chen Y, Zeng W. Flexible molecularly imprinted glucose sensor based on graphene sponge and Prussian blue. Bioelectrochemistry 2024; 156:108628. [PMID: 38104457 DOI: 10.1016/j.bioelechem.2023.108628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/10/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
To enhance the sensitivity of flexible glucose sensors made with 3-aminophenylboronic acid and pyrrole as functional molecules and a carbon tri-electrode as substrate, graphene sponge (GS) and Prussian blue (PB) were used to enhance the charge transfer between the molecularly imprinted cavities and the electrodes. Electrochemical impedance spectroscopy and cyclic voltammetry showed that modifying the electrode with GS and PB significantly reduced the charge transfer impedance and increased the redox current of the sensor. The sensor has a sensitivity of up to 25.81 µA⋅loge (µM)-1⋅cm-2 for the detection of glucose using differential pulse voltammetry in the range of 7.78 to 600 µM, with a low detection limit of 1.08 μM (S/N = 3). When the pH varies in the range of 5.5 to 7.5, the sensor maintains a certain level of stability for glucose detection. The presence of lactic acid, urea, and ascorbic acid had minimal impact on glucose detection by the sensor. After 20 days of storage at room temperature, the sensor maintains 80 % efficiency. This study supports the development of wearable glucose sensors with high sensitivity, specificity, and stability through molecular imprinting.
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Affiliation(s)
- Bin Li
- Flexible Sensing Technology Research Center, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China
| | - Yongqiang Dai
- Flexible Sensing Technology Research Center, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China
| | - Chaosheng Shi
- Flexible Sensing Technology Research Center, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China
| | - Xinying Guo
- Flexible Sensing Technology Research Center, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China
| | - Yizhong Chen
- Flexible Sensing Technology Research Center, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China
| | - Wei Zeng
- Flexible Sensing Technology Research Center, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, China.
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Yu S, Wang J, Sun Y, Wang Q, Kang Q, Shen D. A differential strategy to enhance the anti-interference ability of molecularly imprinted electrochemiluminescence sensor with a semi-logarithmic calibration curve. Anal Chim Acta 2023; 1280:341875. [PMID: 37858560 DOI: 10.1016/j.aca.2023.341875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/11/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023]
Abstract
The non-specific adsorption behaviors of various interferents on the surface of a molecularly imprinted polymer (MIP) are adverse for the selectivity of an MIP-based sensor, which can be overcome via a differential strategy by using the differential signal between MIP- and non-imprinted polymer (NIP)-based sensors. However, the normal differential mode is not suitable for the MIP-based sensors with non-linear calibration curves. Herein, an improved differential strategy is reported for an MIP-based sensor with a semi-logarithmic calibration curve, demonstrated by an electrochemiluminescence (ECL) sensor for dopamine (DA). Glassy carbon electrode (GCE) was modified by the mixture of g-C3N4, TiO2 nanoparticles (NPs) and carbon nanotubes (CNTs). MIP membrane for DA was fabricated on the surface of g-C3N4/TiO2NPs/CNTs/GCE using chitosan for film-forming, obtained MIP@GCE. To enhance the anti-interference ability of the MIP-based DA sensor, the difference between exponential functions ECL intensities of MIP@GCE and NIP@GCE is used as the analytical signal in the improved differential strategy. The differential signal was increased linearly with increasing DA concentration ranging from 10 pM to 0.10 μM, with the detection limit of 5.6 pM. The interference level of Cu2+ on DA determination in the improved differential mode is only 9.7% of that in the normal MIP mode. The improved differential strategy can be used in other MIP-based sensors with semi-logarithmic calibration curves.
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Affiliation(s)
- Shumin Yu
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, PR China
| | - Jiangru Wang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, PR China
| | - Yue Sun
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, PR China
| | - Qingqing Wang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, PR China
| | - Qi Kang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, PR China
| | - Dazhong Shen
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, PR China.
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Chi H, Wang L, Wang S, Liu G. An electrochemiluminescence sensor based on CsPbBr 3 -zquantum dots and poly (3-thiophene acetic acid) cross-linked nanogold imprinted layer for the determination of benzo(a)pyrene in edible oils. Food Chem 2023; 426:136508. [PMID: 37348399 DOI: 10.1016/j.foodchem.2023.136508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 05/16/2023] [Accepted: 05/30/2023] [Indexed: 06/24/2023]
Abstract
A novel quench molecularly imprinted electrochemiluminescence sensor (MIECLS) based on a covalent organic framework composite (COF-300-Au) with enhanced electrochemiluminescence (ECL) signal from CsPbBr3 quantum dots and cross-linked 3-thiopheneacetic acid functionalized AuNPs (3-TAA@AuNPs) was developed for the detection of the environmental pollutant benzo(a)pyrene (BaP). A composite material constructed of COF-300-Au with a large specific surface area served as the sensor's support substrate, providing more CsPbBr3 and imprint recognition sites. Electropolymerization was then employed to form an AuNPs three-dimensional imprinting layer with polythiophene cross-linked using BaP as a template and 3-TAA@AuNPs as a functional monomer. A specific cross-linked imprinting recognition effect was recorded on BaP along with the quenching effect of quinones. The density functional theory (DFT) evaluation of the binding mechanism between 3-TAA@AuNPs and BaP revealed powerful MIECLS toward the detection of BaP at concentrations ranging from 10-14 to 10-5M, with a detection limit of as low as 4.1 × 10-15 M.
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Affiliation(s)
- Hai Chi
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Lei Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Shuo Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Guoqin Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China.
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Zhang S, Shao K, Hong C, Chen S, Lin Z, Huang Z, Lai Z. Fluorimetric identification of sulfonamides by carbon dots embedded photonic crystal molecularly imprinted sensor array. Food Chem 2023; 407:135045. [PMID: 36493493 DOI: 10.1016/j.foodchem.2022.135045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 11/16/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022]
Abstract
Identification of sulfonamides (SAs) residues in food is vital for human health. A set of 4-channel sensor array was constructed by carbon dots (CDs) embedded in photonic crystal molecularly imprinted (PCMIP@CDs) film which included 3 PCMIP@CDs units and 1 PCNIP@CDs unit to determine typical SAs: sulfadimethoxine, sulfathiazole, sulfaguanidine, sulfamethazine, sulfadiazine. Under the optimal conditions, the response time of the sensor array was only 200 s. Moreover, 300 fluorescence response signals (4 sensor units × 5 sulfonamides × 3 concentrations × 5 repeats) were processed by pattern recognition technique to analyze the ability of the sensor array to recognize 5 kinds of SAs. Subsequently, the linear discrimination analysis (LDA) method was used to identify the five SAs simultaneously with 100 % classification accuracy and the limit of detection was 0.01-0.26 nmol/L. Moreover, the proposed method can effectively identify-five SAs in water and fish samples.
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Affiliation(s)
- Shishun Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Quality Control (QC), WuXi Biologics, 108 Meiliang Road, MaShan Binhu District, Wuxi 214092, China
| | - Keman Shao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Chengyi Hong
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Suyan Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Zhengzhong Lin
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Zhiyong Huang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China.
| | - Zhuzhi Lai
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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Liu C, Liao J, Zheng Y, Chen Y, Liu H, Shi X. Random forest algorithm-enhanced dual-emission molecularly imprinted fluorescence sensing method for rapid detection of pretilachlor in fish and water samples. J Hazard Mater 2022; 439:129591. [PMID: 35853336 DOI: 10.1016/j.jhazmat.2022.129591] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/25/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
A sensitive and efficient fluorescence sensor based on dual-emission molecularly imprinted polymers (Dual-em-MIPs) was successfully developed using the random forest (RF) machine-learning algorithm for the rapid detection of pretilachlor. SiO2 coatings on red-emitting CdSe/ZnS quantum dots (r-SiO2@QDs) as intermediate light-emitting components are non-selective for pretilachlor, whereas molecularly imprinted layers coated with blue-emitting nitrogen-doped graphene quantum dots (N-GQDS) are selective. Fluorescence images of the Dual-em-MIPs were acquired. The red (R), green (G), and blue (B) color values of the image were analyzed using an RF algorithm, and the classifier was trained using 103 fluorescent images for automatic analyses. Under optimized conditions, an excellent linear relationship between the sensor and pretilachlor was obtained in the range of 0.001-5.0 mg/L (R2, 0.9958). Additionally, the satisfactory recoveries of Dual-em-MIPs ranged between 92.2 % and 107.6 % for the real samples, with a relative standard deviation (RSD) under 6.5 %. The satisfactory recoveries of the RF model based on the fluorescence sensor were 84.2-108.2 % with the RSD under 6.4 %. Overall, the proposed fluorescence sensor based on Dual-em-MIPs and machine learning methods was successfully used to determine pretilachlor in the environment and in aquatic products.
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Affiliation(s)
- Chenxi Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Jingxin Liao
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Yong Zheng
- School of Mathematics, South China University of Technology, Guangzhou, China
| | - Ying Chen
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China; Department of Food Science and Technology, National University of Singapore, Science Drive 2, 117542, Singapore
| | - Hongsheng Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China.
| | - Xizhi Shi
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, PR China.
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Liu X, Li X, Zhu L, Wang X. Preparation of molecularly imprinted Ag-TiO 2 for photocatalytic removal of ethyl paraben. Environ Sci Pollut Res Int 2022; 29:10308-10318. [PMID: 34515930 DOI: 10.1007/s11356-021-16168-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Herein, MI-Ag-TiO2 was prepared by one-step sol-gel method, and its photocatalytic and characterization performance were fully analyzed. Within 120 min, the photocatalytic degradation rate of MI-Ag-TiO2 to ethyl paraben was 93.4%, which was 1.48 times that of naked TiO2. Compared with Ag-TiO2, MI-TiO2, and TiO2, the photocatalytic selectivity of MI-Ag-TiO2 to target pollutants increased by 24.5%, 31.5%, and 100%, respectively. Hence, the one-step molecular imprinting method can simply and quickly improve the photocatalytic performance of TiO2. This research may help to further promote the practical application of molecularly imprinted photocatalysts in the future.
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Affiliation(s)
- Xian Liu
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Xiaoya Li
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Lei Zhu
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan, 430065, China.
| | - Xun Wang
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan, 430065, China.
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Yu C, Li L, Ding Y, Liu H, Cui H, Zhang F, Lin J, Duan Y. A sensitive molecularly imprinted electrochemical aptasensor for highly specific determination of melamine. Food Chem 2021; 363:130202. [PMID: 34304106 DOI: 10.1016/j.foodchem.2021.130202] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/19/2021] [Accepted: 05/22/2021] [Indexed: 12/29/2022]
Abstract
An electrochemical aptamer sensor based on gold nanoparticles (AuNPs) was developed for highly specific sensing of melamine (MEL), which combines molecularly imprinted polymers (MIPs) and aptamers. AuNPs were synthesized by simple reduction of sodium citrate and characterized by transmission electron microscopy. The MIP membranes with particular recognition sites were formed by electropolymerization of dopamine (DA) with polythymine (poly T) aptamers as functional monomers and melamine as template molecules. Under optimal experimental conditions, this molecularly imprinted electrochemical aptamer sensor (MIEAS) exhibits a linear relationship between 10-12 M and 10-4 M for detecting MEL with the detection limit of 6.7 × 10-13 M. Moreover, this sensor displays excellent selectivity, reproducibility and stability. The milk samples analysis has confirmed the potential application of this MIEAS to quantitative detection of melamine.
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Affiliation(s)
- Chenhong Yu
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Li Li
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Yaping Ding
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Huajie Liu
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, PR China.
| | - Hanyue Cui
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Fenfen Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Jiaxin Lin
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Yingchun Duan
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
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Zhang L, Luo K, Li D, Zhang Y, Zeng Y, Li J. Chiral molecular imprinted sensor for highly selective determination of D-carnitine in enantiomers via dsDNA-assisted conformation immobilization. Anal Chim Acta 2020; 1136:82-90. [PMID: 33081952 DOI: 10.1016/j.aca.2020.08.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/03/2020] [Accepted: 08/22/2020] [Indexed: 02/08/2023]
Abstract
In this paper, a novel approach was established on the basis of a molecularly imprinted technique with the aid of double-stranded deoxyribonucleic acid (dsDNA) embedded in a molecularly imprinted polymer (MIP) membrane as a new functional unit with chiral recognition for highly specific chiral recognition. The chiral molecules were immobilized and anchored in the cavities of the MIP membrane on the basis of the three-dimensional structure of a molecule determined by the functional groups, spatial characterization of the cavities of MIPs, and the spatial orientation with dsDNA embedded in MIPs. D-carnitine was selected as an example of a chiral molecular template, which intercalated into dsDNA immobilized on the gold electrode surface to form dsDNA-D-carnitine complex, and then the complex was embedded in the MIP during electropolymerization. After elution, the stereo-selective cavities were obtained. Our findings have shown that AAAA-TTTT base sequence had high affinity for D-carnitine intercalation. Combined with the electrochemical detection method, MIP sensor was prepared. The selectivity of the MIP sensor to ultratrace D-carnitine was significantly improved; the sensor had remarkable stereo-selectivity and highly chiral specific recognition to D-carnitine, and L-carnitine with a concentration of 10,000 times D-carnitine did not interfere with the detection of D-carnitine in the assay of raceme. The sensor also exhibited high sensitivity to ultratrace D-carnitine determination with a linear response to the concentration of D-carnitine in the range of 3.0 × 10-16 mol/L to 4.0 × 10-13 mol/L, with a detection limit of 2.24 × 10-16 mol/L. The mechanism of chiral recognition was studied, and result showed that apart from the recognition effect of imprinted cavities, dsDNA provided chiral selectivity to the spatial orientation of chiral molecules via the intercalation of chiral molecules with dsDNA and electrostatic interaction with groups of DNA base.
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Affiliation(s)
- Lianming Zhang
- Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China; College of Material and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610000, PR China
| | - Kui Luo
- Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China
| | - Dan Li
- Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China
| | - Yufu Zhang
- Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China
| | - Ying Zeng
- College of Material and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610000, PR China
| | - Jianping Li
- Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China.
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Liu CX, Zhao J, Zhang RR, Zhang ZM, Xu JJ, Sun AL, Chen J, Shi XZ. Development and application of fluorescence sensor and test strip based on molecularly imprinted quantum dots for the selective and sensitive detection of propanil in fish and seawater samples. J Hazard Mater 2020; 389:121884. [PMID: 31879102 DOI: 10.1016/j.jhazmat.2019.121884] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/28/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
Molecularly imprinted quantum dots (MIP-QDs) were successfully synthesized via reversed-phase microemulsion and used as the specific recognition element and signal probe of a fluorescence sensor or test strip to achieve the highly sensitive detection of propanil. The physical-chemical characteristics and excellent selectivity of MIP-QDs were elucidated. Under optimized parameters, the MIP-QDs had good linearity at the propanil concentration range of 1.0 μg/L to 20.0 × 103 μg/L by fluorescence quenching. The developed MIP-QD-based fluorescence sensor showed good recoveries ranging from 87.2 % to 112.2 %, and the relative standard deviation was below 6.0 % for the fish and seawater samples. In addition, the limits of detection (LODs) for fish and seawater were 0.42 μg/kg and 0.38 μg/L, respectively. The fluorescence test strip developed on the basis of the MIP-QDs also displayed satisfactory recoveries of 90.1 %-111.1 %, and the LOD for propanil in the seawater sample was 0.6 μg/L. The proposed fluorescence sensor and test strip were successfully used in propanil determination in environment and aquatic products.
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Affiliation(s)
- Chen-Xi Liu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, PR China.
| | - Jian Zhao
- Ningbo Academy of Agricultural Sciences, 19 Houde Road, Ningbo, 315040, PR China.
| | - Rong-Rong Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China.
| | - Ze-Ming Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China.
| | - Jin-Jin Xu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, PR China.
| | - Ai-Li Sun
- School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China.
| | - Jiong Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China.
| | - Xi-Zhi Shi
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China.
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Xu Y, Wang J, Lu Y, Dai X, Yan Y. Preparation of functionalized double ratio fluorescent imprinted sensors for visual determination and recognition of dopamine in human serum. Spectrochim Acta A Mol Biomol Spectrosc 2019; 219:225-231. [PMID: 31048251 DOI: 10.1016/j.saa.2019.04.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/02/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
Ratiometric fluorescent sensors have shown great prospect in chemical monitoring and recognition due to its high intuitiveness, accurateness, and visualization. In this work, the ratiometric fluorescent sensors, which includes a blue fluorescent Carbon quantum dots (CQDs) as internal standard material, and a red fluorescent boric acid-modified CdTe QDs as response signal. Then we choose dopamine (DA) as template, 3-phenylboronic acid (APBA) for functional monomers, tetraethyl orthosilicate (TEOS) for cross-linker to synthesize double ratio molecularly imprinted polymers (DR-MIPs) that can identify dopamine selectively and sensitively. The DR-MIPs has better capability of selective recognition, obvious anti-ion interference, rapid detection and good visualization. Furthermore, the unique DR-MIPs was proved as efficient visual sensors for determination of DA in human serum rapidly and efficiently. The DR-MIPs still displayed well accuracy, and the potential prospects of this smart sensor is clearly demonstrated in the context of modern clinical medicine.
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Affiliation(s)
- Yeqing Xu
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, PR China
| | - Jixiang Wang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, PR China
| | - Yang Lu
- School of Chemistry, Jilin normal University, Siping, 136000, PR China; Yangzhong Tiande Electrical Equipment Co.LTD, Zhengjiang 212013, PR China
| | - Xiaohui Dai
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, PR China
| | - Yongsheng Yan
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, PR China.
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Li X, Jiao HF, Shi XZ, Sun A, Wang X, Chai J, Li DX, Chen J. Development and application of a novel fluorescent nanosensor based on FeSe quantum dots embedded silica molecularly imprinted polymer for the rapid optosensing of cyfluthrin. Biosens Bioelectron 2017; 99:268-273. [PMID: 28778030 DOI: 10.1016/j.bios.2017.07.071] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/22/2017] [Accepted: 07/28/2017] [Indexed: 11/16/2022]
Abstract
A novel molecularly imprinted silica layer appended to FeSe quantum dots (MIP-FeSe-QDs) was fabricated and utilized as a recognition element to develop a selective and sensitive fluorescent nanosensor for cyfluthrin (CYF) determination. The MIP-FeSe-QDs were characterized by fluorescence spectrometry, scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. Excellent selectivity and high sensitivity of MIP-FeSe-QDs to CYF molecules were observed based on the fluorescence quenching of FeSe-QDs. Under optimal conditions, a good linear relationship was found between fluorescence quenching effect and increased CYF concentration within 0.010-0.20mg/L, with a correlation coefficient of 0.9911. The practicality of the developed sensor method for CYF detection in fish and sediment samples was further validated. Good recoveries ranging from 88.0% to 113.9% with<6.8% relative standard deviations were obtained. The detection limits of CYF in sediment and fish samples were 1.3 and 1.0µg/kg, respectively. This study established a novel, rapid fluorescent nanosensor detection method based on MIP-QDs for successfully analyzing CYF in fish and sediment samples.
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Affiliation(s)
- Xunjia Li
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China
| | - Hai-Feng Jiao
- Ningbo Academy of Oceanology and Fishery, Ningbo 315012, PR China
| | - Xi-Zhi Shi
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo 315211, PR China.
| | - Aili Sun
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China
| | - Xiujuan Wang
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China
| | - Jiye Chai
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China
| | - De-Xiang Li
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China
| | - Jiong Chen
- School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China
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12
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Wang X, Wang Y, Ye X, Wu T, Deng H, Wu P, Li C. Sensing platform for neuron specific enolase based on molecularly imprinted polymerized ionic liquids in between gold nanoarrays. Biosens Bioelectron 2017; 99:34-39. [PMID: 28735044 DOI: 10.1016/j.bios.2017.07.037] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 06/29/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
Abstract
A molecularly imprinted electrochemical sensor for neuron specific enolase (NSE) was developed by electrochemical polymerizing ionic liquid, which was functionalized with pyrrole moiety, in between gold nanoarrays. A well-defined 3D structured gold nanoarray was fabricated on a glassy carbon electrode (GCE) surface by using template-assisted electrochemical deposition technique. 1-(3-mercaptopropyl)-3-vinyl-imidazolium tetrafluoroborate was self-assembled onto the surface of gold nanoarrays to produce active sites for anchoring the molecularly imprinted film. Subsequently, an electrochemical polymerization procedure was carried out in an aqueous solution containing 1,3-di(3-N-pyrrolpropyl)imidazolium bromine ionic liquid and neuron specific enolase (NSE). After removing NSE templates, a molecularly imprinted sensor was successfully fabricated. The sensor showed high selectivity and sensitivity towards NSE, produced a linear response in the concentration range from 0.01 to 1.0ngmL-1 and had a detection limit of 2.6pgmL-1 with an incubation time of 15min. The developed sensor was demonstrated successful in determining NSE in clinical serum samples.
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Affiliation(s)
- Xing Wang
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Yanying Wang
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Xiaoxue Ye
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Tsunghsueh Wu
- Department of Chemistry, University of Wisconsin-Platteville, 1 University Plaza, Platteville, WI 53818-3099, USA
| | - Hongping Deng
- Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Peng Wu
- Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Chunya Li
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China.
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Li S, Liu C, Yin G, Zhang Q, Luo J, Wu N. Aptamer- molecularly imprinted sensor base on electrogenerated chemiluminescence energy transfer for detection of lincomycin. Biosens Bioelectron 2017; 91:687-691. [PMID: 28119249 DOI: 10.1016/j.bios.2017.01.038] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/16/2017] [Accepted: 01/18/2017] [Indexed: 01/05/2023]
Abstract
In this study, a biosensor with a dual recognition system comprising a molecularly imprinted polymer (MIP) and aptamers selective for lincomycin was fabricated. The MIP was synthesized by electropolymerization of carbon dots (C-dots)-tagged DNA aptamers combined with lincomycin and o-aminophenol on the gold-nanoparticle-functionalized graphene oxide (Au-GO)-modified electrode. Electrogenerated chemiluminescence (ECL) resonance energy transfer was observed between Au-GO and C-dots. After the C-dots accepted the energy, they acted as a signal indicator and exhibited enhanced signal intensity in the presence of target lincomycin. When lincomycin was competitively bound to DNA aptamers and MIP, it blocked the transfer of energy, and a decreased ECL signal was observed. Hence, a dual recognition method for the detection of lincomycin is realized. Using this strategy, the sensor exhibited a linear ECL response to lincomycin at concentrations from 5.0 × 10 -12 mol/L to 1.0 × 10 -9 mol/L. The detection limit of this assay was found to be 1.6 × 10 -13 mol/L. This method was utilized to determine lincomycin residuals in meat samples with satisfactory results.
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Affiliation(s)
- Shuhuai Li
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China.
| | - Chunhua Liu
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Guihao Yin
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Qun Zhang
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Jinhui Luo
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China.
| | - Nanchun Wu
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
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Santos MG, Tavares IMC, Barbosa AF, Bettini J, Figueiredo EC. Analysis of tricyclic antidepressants in human plasma using online-restricted access molecularly imprinted solid phase extraction followed by direct mass spectrometry identification/quantification. Talanta 2016; 163:8-16. [PMID: 27886774 DOI: 10.1016/j.talanta.2016.10.047] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 10/07/2016] [Accepted: 10/08/2016] [Indexed: 10/20/2022]
Abstract
The use of a new class of hybrid materials, called restricted access molecularly imprinted polymers (RAMIPs) seems to present a good strategy for the sample preparation of complex matrices, since these materials combine good protein elimination capacity with high degree selectivity. Mass spectrometers (MS) have been successfully used for polar drug identification and quantification. In order to combine the advantages of both RAMIPs and mass spectrometry, we proposed a study that joins these properties in a single system, where we could analyse tricyclic antidepressants from human plasma, without offline extraction or chromatographic separation. A RAMIP for amitriptyline was synthesised by the bulk method, using methacrylic acid as a functional monomer and glycidilmethacrylate as a hydrophilic co-monomer. Then, epoxide ring openings were made and the polymer was covered with bovine serum albumin (BSA). A column filled with RAMIP-BSA was coupled to a MS/MS instrument in an online configuration, using water as loading and reconditioning mobile phase and a 0.01% acetic acid aqueous solution: acetonitrile at 30:70 as elution mobile phase. The system was used for on-line extraction and simultaneous quantification of nortriptyline, desipramine, amitriptyline, imipramine, clomipramine and clomipramine-d3 (IS) (from 15.0 to 500.0μgL-1) from plasma samples. The correlation coefficient was higher than 0.99 for all analytes. The CV (coefficient of variation) values ranged from 1.34% to 19.13% for intra assay precision and 1.32-19.77% for inter assay precision. The E% (relative error) values ranged from -19.15% to 19.51% for intra assay accuracy and from -9.04% to 16.22% for inter assay accuracy.
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Affiliation(s)
- Mariane Gonçalves Santos
- Toxicants and Drugs Analysis Laboratory - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva Street, 37130-000 Alfenas, MG, Brazil.
| | - Isabela Maria Campos Tavares
- Toxicants and Drugs Analysis Laboratory - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva Street, 37130-000 Alfenas, MG, Brazil
| | - Adriano Francisco Barbosa
- Toxicants and Drugs Analysis Laboratory - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva Street, 37130-000 Alfenas, MG, Brazil
| | - Jefferson Bettini
- Brazilian Nanotechnology National Laboratory, 13083-970 Campinas, SP, Brazil
| | - Eduardo Costa Figueiredo
- Toxicants and Drugs Analysis Laboratory - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva Street, 37130-000 Alfenas, MG, Brazil
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Li W, Zhang H, Chen S, Liu Y, Zhuang J, Lei B. Synthesis of molecularly imprinted carbon dot grafted YVO4:Eu(3+) for the ratiometric fluorescent determination of paranitrophenol. Biosens Bioelectron 2016; 86:706-13. [PMID: 27474968 DOI: 10.1016/j.bios.2016.07.034] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 06/02/2016] [Accepted: 07/11/2016] [Indexed: 11/22/2022]
Abstract
A facilely prepared ratiometric fluorescent molecularly imprinted sensor has been constructed for highly sensitive and selective detection of 4-nitrophenol (4-NP) using carbon dots (CDs) as the target sensitive fluorophore and YVO4: Eu(3+) nanoparticles (NPs) as the reference fluorophore. Through the hydrolysis and condensation reactions of the silica precursor, CDs and YVO4 Eu(3+) NPs can be incorporated into silica networks through silylation reaction by one pot synthesis procedure. The as-prepared fluorescent molecularly imprinted sensor shows characteristic fluorescence emissions of CDs (blue) and YVO4:Eu(3+) (red) under a single excitation wavelength. With the addition of 4-NP, the fluorescence of CDs is selectively quenched, resulting in the ratiometric fluorescence response. Under optimum conditions, the proposed sensor exhibits a high sensitivity with a linear range from 0 to 12.0μM and shows the limit of detection as low as 0.15μM in the determination of 4-NP, which is probably benefits from the tailor-made imprinted cavities for binding 4-NP. Furthermore, the proposed method was successfully applied for the determination of 4-NP in real water samples and human urine samples with great potentials for monitoring of 4-NP in environmental application.
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Arabi M, Ghaedi M, Ostovan A. Development of dummy molecularly imprinted based on functionalized silica nanoparticles for determination of acrylamide in processed food by matrix solid phase dispersion. Food Chem 2016; 210:78-84. [PMID: 27211623 DOI: 10.1016/j.foodchem.2016.04.080] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 04/11/2016] [Accepted: 04/17/2016] [Indexed: 11/27/2022]
Abstract
A novel technique was applied for the synthesis of dummy molecularly imprinted silica nanoparticles (DMISNPs). DMISNPs were characterized by Fourier transmission infrared spectrometry, scanning electron microscopy and transmission electron microscope. The material was used as dispersant for the analysis of biscuit and bread samples using matrix solid phase dispersion (MSPD). Of advantages of such approach may be counted as the simplicity of synthesis procedure, low consumption of organic solvent, mild working temperature during the synthesis, high binding capacity and affinity. The effect of various parameters such as sample-to-dispersant ratio and eluents volume on extraction recovery was investigated and optimized by central composite design under response surface methodology. It was proven that the proposed dispersant leads to high affinity toward acrylamide even in complicated matrices. Quantification of the acrylamide was carried out by high performance liquid chromatography with UV detection (HPLC-UV).
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Affiliation(s)
- Maryam Arabi
- Chemistry Department, Yasouj University, Yasouj 75914-35, Iran
| | | | - Abbas Ostovan
- Department of Chemistry, Kerman Branch, Islamic Azad University, Kerman, Iran
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Chen HJ, Zhang ZH, Cai R, Chen X, Liu YN, Rao W, Yao SZ. Molecularly imprinted electrochemical sensor based on amine group modified graphene covalently linked electrode for 4-nonylphenol detection. Talanta 2013; 115:222-7. [PMID: 24054583 DOI: 10.1016/j.talanta.2013.04.069] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 04/22/2013] [Accepted: 04/24/2013] [Indexed: 11/30/2022]
Abstract
In this work, an imprinted electrochemical sensor based on electrochemical reduced graphene covalently modified carbon electrode was developed for the determination of 4-nonylphenol (NP). An amine-terminated functional graphene oxide was covalently modified onto the electrode surface with diazonium salt reactions to improve the stability and reproducibility of the imprinted sensor. The electrochemical properties of each modified electrodes were investigated with differential pulse voltammetry (DPV). The electrochemical characteristic of the imprinted sensor was also investigated using electrochemical impedance spectroscopy (EIS) in detail. The response currents of the imprinted electrode exhibited a linear relationship toward 4-nonylphenol concentration ranging from 1.0 × 10(-11) to 1.0 × 10(-8) gm L(-1) with the detection limit of 3.5 × 10(-12) gm L(-1) (S/N=3). The fabricated electrochemical imprinted sensor was successfully applied to the detection of 4-nonylphenol in rain and lake water samples.
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Affiliation(s)
- Hong-Jun Chen
- Key laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Hunan 427000, PR China; College of Chemistry and Chemical Engineering, Jishou University, Hunan 416000, PR China
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