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Zhang C, Li S, Tang L, Li S, Hu C, Zhang D, Chao L, Liu X, Tan Y, Deng Y. Ultrasensitive, Label-Free Voltammetric Detection of Dibutyl Phthalate Based on Poly-l-lysine/poly(3,4-ethylenedioxythiophene)-porous Graphene Nanocomposite and Molecularly Imprinted Polymers. BIOSENSORS 2024; 14:121. [PMID: 38534228 DOI: 10.3390/bios14030121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/20/2024] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
Development of an efficient technique for accurate and sensitive dibutyl phthalate (DBP) determination is crucial for food safety and environment protection. An ultrasensitive molecularly imprinted polymers (MIP) voltammetric sensor was herein engineered for the specific determination of DBP using poly-l-lysine/poly(3,4-ethylenedioxythiophene)/porous graphene nanocomposite (PLL/PEDOT-PG) and poly(o-phenylenediamine)-imprinted film as a label-free and sensing platform. Fabrication of PEDOT-PG nanocomposites was achieved through a simple liquid-liquid interfacial polymerization. Subsequently, poly-l-lysine (PLL) functionalization was employed to enhance the dispersibility and stability of the prepared PEDOT-PG, as well as promote its adhesion on the sensor surface. In the presence of DBP, the imprinted poly(o-phenylenediamine) film was formed on the surface of PLL/PEDOT-PG. Investigation of the physical properties and electrochemical behavior of the MIP/PLL/PEDOT-PG indicates that the incorporation of PG into PEDOT, with PLL uniformly wrapping its surface, significantly enhanced conductivity, carrier mobility, stability, and provided a larger surface area for specific recognition sites. Under optimal experimental conditions, the electrochemical response exhibited a linear relationship with a logarithm of DBP concentration within the range of 1 fM to 5 µM, with the detection limit as low as 0.88 fM. The method demonstrated exceptional stability and repeatability and has been successfully applied to quantify DBP in plastic packaging materials.
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Affiliation(s)
- Chuanxiang Zhang
- College of Packing and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Song Li
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Lingxiao Tang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Shuo Li
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Changchun Hu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Dan Zhang
- College of Packing and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China
| | - Long Chao
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Xueying Liu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Yimin Tan
- College of Packing and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Yan Deng
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
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Lokesh Kumar S, Kumar S, Tetala KKR. A manganese dioxide nanoparticle-bimetallic metal organic framework composite for selective and sensitive detection of vitamin D 3 in human plasma. Mikrochim Acta 2023; 190:345. [PMID: 37542579 DOI: 10.1007/s00604-023-05904-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 07/05/2023] [Indexed: 08/07/2023]
Abstract
For the first time a metal organic framework nanomaterial has been developed comprising manganese dioxide nanoparticle and iron and zinc metal ions interlinked with each other via terephthalic acid. The framework shape was identified as an elongated hexagonal nanorod (TEM) with varying functional groups (FT-IR) and diffraction patterns (XRD). The framework nanocomposite as such in aqueous acidic electrolyte solution has displayed an excellent conductivity (redox behavior) and surface excess (3.08 × 10-8 cm-2). Under the optimized conditions (0.1 M H2SO4 as electrolyte, 50 mV/s scan rate, +1.26 V (vs Ag/AgCl)), the metal organic framework coated electrode has selectively identified vitamin D3 (VD3) in the presence of various other interfering molecules and displayed excellent limit of detection (1.9 ng mL-1). The developed sensor has been applied to the determination of VD3 in extracted human plasma samples (RSD of 0.3-2.6 % and recovery of 96-102 %), and the obtained VD3 values are similar to HPLC-UV method.
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Affiliation(s)
- S Lokesh Kumar
- Centre for Bioseparation Technology (CBST), Vellore Institute of Technology (VIT), Tamilnadu, 632014, Vellore, India
| | - Sanjit Kumar
- Centre for Bioseparation Technology (CBST), Vellore Institute of Technology (VIT), Tamilnadu, 632014, Vellore, India
| | - Kishore K R Tetala
- Centre for Bioseparation Technology (CBST), Vellore Institute of Technology (VIT), Tamilnadu, 632014, Vellore, India.
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Paisanpisuttisin A, Poonwattanapong P, Rakthabut P, Ariyasantichai P, Prasittichai C, Siriwatcharapiboon W. Sensitive electrochemical sensor based on nickel/PDDA/reduced graphene oxide modified screen-printed carbon electrode for nitrite detection. RSC Adv 2022; 12:29491-29502. [PMID: 36320740 PMCID: PMC9562089 DOI: 10.1039/d2ra03918d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 09/30/2022] [Indexed: 12/02/2022] Open
Abstract
A simple, rapid method of the determination of nitrite in food samples is reported by using a highly sensitive electrochemical sensor based on nickel, poly(diallyldimethylammonium chloride) (PDDA), reduced graphene oxide (rGO) and a disposable screen-printed carbon electrode (SPCE). The method is based on a modification of the electrode to enhance the sensitivity and selectivity of the disposable and applicable SPCE, which is essential for the present analytical challenge. The nitrite determination was performed by using a cyclic voltammetry (CV) method under optimum conditions. Ni/PDDA/rGO/SPCE showed a linear working range of 6 to 100 μM of nitrite concentration. The limit of detection and limit of quantification were 1.99 μM (S/N = 3) and 6.6 μM (S/N = 10), respectively. The sensitivities were 0.453 μA μM-1 cm-2 for the lower concentration range and 0.171 μA μM-1 cm-2 for the higher concentration range. The Ni/PDDA/rGO sensor also showed excellent anti-interference ability and good long-term stability. The purposed disposable sensor was successfully applied to determine nitrite in sausages and pickled vegetable samples with satisfactory recovery.
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Affiliation(s)
| | | | - Punnada Rakthabut
- Department of Chemistry, Faculty of Science, Kasetsart UniversityBangkok 10900Thailand
| | | | - Chaiya Prasittichai
- Department of Chemistry, Faculty of Science, Kasetsart UniversityBangkok 10900Thailand,Center of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart UniversityBangkok 10900Thailand
| | - Wilai Siriwatcharapiboon
- Department of Chemistry, Faculty of Science, Kasetsart UniversityBangkok 10900Thailand,Center of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart UniversityBangkok 10900Thailand
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