Titanium Oxide Nanocubes Embedded Molecularly Imprinted Polymer-Based Electrode for Selective Detection of Caffeine in Green Tea

Das, Debangana; Chatterjee, Trisita Nandy; Roy, Runu Banerjee; Tudu, Bipan; Hazarika, Ajanto Kumar; Sabhapondit, Santanu; Bandyopadhyay, Rajib

doi:10.1109/jsen.2020.2972773

Cited by 31 publications

(3 citation statements)

References 46 publications

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“…Several examples of electrochemical sensors have been reported for the quantitation of CAF and THEO. The most common analytical parameters, such as linearity range, LOD and application media of a series of literature data were compared and resumed in Table 8 [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. Most of the electrochemical sensors showed a limited linearity range, generally two or three orders of magnitude, confining the field of application to specific matrices, e.g., only teas.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Sensing Platform Based on Carbon Dots for the Simultaneous Determination of Theophylline and Caffeine in Tea

Di Matteo,

Trani,

Bortolami

et al. 2023

Sensors

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A simple and selective method for the determination of caffeine (CAF) and theophylline (THEO) has been developed for a glassy carbon electrode (GCE) modified with a composite including carbon dots (CDs) and chitosan (CS). To our knowledge, there are no previous studies that analyze a CDs-modified GCE for the presence of CAF and THEO. The electrochemical behavior of a GCE modified with a CDs-CS composite was studied in acidic medium by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Considering the sensor analytical parameters, the same linear concentrations range was found for CAF and THEO ranging from 1 × 10−5 to 5 × 10−3 mol L−1 with the same detection limit (LOD) of 1 × 10−6 mol L−1. The reproducibility and repeatability data were satisfactory in terms of RSD%. Moreover, the storage stability was evaluated, evidencing good results whatever the experimental conditions used. The developed sensor was applied for the simultaneous determination of CAF and THEO in tea and drug, and results were compared with those obtained with HPLC-ESI-MS in SIR mode as an independent method optimized on purpose. The electrochemical sensor presents the undoubled advantages in terms of cheapness, portability, and ease of use, since it does not require skilled personnel.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Sensing Platform Based on Carbon Dots for the Simultaneous Determination of Theophylline and Caffeine in Tea

Di Matteo,

Trani,

Bortolami

et al. 2023

Sensors

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show abstract

“…The sensor has a wide linear range, low detection limit, good reproducibility, stability, and selectivity, and has been successfully used for the determination of rutin in real solutions. [ 166 ] Das et al [ 167 ] developed a low‐cost electrode for the determination of caffeine in green tea using MIPs technology. Using acrylonitrile (AN) and EGDMA to form MIPs modified TiO 2 nanocubes, a molecularly imprinted electrode sensor was synthesized.…”

Section: Mips For Plant Active Componentsmentioning

confidence: 99%

Application of Molecularly Imprinted Polymers in Plant Natural Products: Current Progress and Future Perspectives

Zuo

et al. 2022

Macro Materials & Eng

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Plants, as a large and complex system, are rich in a variety of natural bioactive constituents. It is crucial to enrich, isolate, purify and detect these natural products. Molecularly imprinted polymers (MIPs) are a class of polymers prepared by molecularly imprinted technology (MIT) that have specific recognition sites and are complementary to templates in shape, size, and binding groups. The synthesis and polymerization mechanism of MIPs are introduced. A variety of preparation methods for MIPs have been developed. MIPs can be classified into three types: non-covalent molecularly imprinted, covalent molecularly imprinted, and semi-covalent molecularly imprinted. MIPs usually consists of five parts: template, functional monomer, cross-linker, initiator, and solvent/reagent. With the advantages of high-specificity binding ability, MIPs have shown excellent efficacy in the separation, enrichment, and purification of plant active products, such as flavonoids, polyphenols, terpenoids, and other components, especially as specific adsorbent materials. Due to the high selectivity to target the analytes, MIPs have also been used as sensors to detect the bioactive constituents in plants. Undeniably, MIPs still face undeniable limitations in the application of plant natural products. The development of MIPs with high selectivity, strong affinity, cost-effectiveness, sensitivity, and environmental friendliness are valuable and promising.

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“…In other cases, multivariate methods have been used to reveal correlations hidden in the data obtained when evaluating MIPs. Different combinations of PCA and PLSR methods have been applied for interpretation of MIP binding data obtained from SERS (surface-enhanced Raman spectroscopy) [ 635 , 636 , 637 , 638 , 639 , 640 , 641 , 642 , 643 , 644 ], for pattern recognition in the responses from various MIP-sensor arrays [ 645 , 646 , 647 , 648 , 649 , 650 , 651 , 652 , 653 , 654 , 655 , 656 , 657 , 658 , 659 , 660 ], to correlate the shape of MIP-quartz crystal microbalance frequency curves to different analytes [ 106 , 661 , 662 , 663 ], for cyclic voltammetry measurements on binary mixtures [ 214 , 656 , 664 , 665 ] and for correlating the results with HPLC data [ 665 ] and to process fluorescence data [ 666 ]. PLSR and PCA have also been used to correlate bupivacaine–MIP binding with rebinding solvent properties [ 667 , 668 ] and with polymer morphology and pre-polymerization interactions from MD simulations [ 403 ].…”

Section: Mip Structure and Functionmentioning

confidence: 99%

The Use of Computational Methods for the Development of Molecularly Imprinted Polymers

et al. 2021

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Recent years have witnessed a dramatic increase in the use of theoretical and computational approaches in the study and development of molecular imprinting systems. These tools are being used to either improve understanding of the mechanisms underlying the function of molecular imprinting systems or for the design of new systems. Here, we present an overview of the literature describing the application of theoretical and computational techniques to the different stages of the molecular imprinting process (pre-polymerization mixture, polymerization process and ligand–molecularly imprinted polymer rebinding), along with an analysis of trends within and the current status of this aspect of the molecular imprinting field.

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Titanium Oxide Nanocubes Embedded Molecularly Imprinted Polymer-Based Electrode for Selective Detection of Caffeine in Green Tea

Cited by 31 publications

References 46 publications

Electrochemical Sensing Platform Based on Carbon Dots for the Simultaneous Determination of Theophylline and Caffeine in Tea

Electrochemical Sensing Platform Based on Carbon Dots for the Simultaneous Determination of Theophylline and Caffeine in Tea

Application of Molecularly Imprinted Polymers in Plant Natural Products: Current Progress and Future Perspectives

The Use of Computational Methods for the Development of Molecularly Imprinted Polymers

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