Constructing electrochemical sensor using molecular-imprinted polysaccharide for rapid identification and determination of l-tryptophan in diet

Li, Yanjun; Lili, Yang; Ni, Li; Xiong, Jia-Min; He, Jie; Zhou, Ling; Luo, Ling; Zhang, Qi‐Hui; Yuan, Chun‐Su

doi:10.1016/j.foodchem.2023.136486

Cited by 12 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated LOD and sensitivity of MoS 2 /S@g-CN/GC for the sensing of L-TRP are displayed in Table 1 and compared with previous literature [1,9,[52][53][54][55][56]. Deng et al [1] reported the fabrication of a graphene-modified acetylene black paste electrode (GR/ABPE) to detect L-tryptophan in the presence of tyrosine.…”

Section: Sensing Behavior Of Mos 2 /S@g-c 3 N 4 -Modified Electrodementioning

confidence: 95%

“…The calculated LOD and sensitivity of MoS2/S@g-CN/GC for the sensing of L-TRP are displayed in Table 1 and compared with previous literature [1,9,[52][53][54][55][56]. In the present work, we determined the electrochemical sensing parameters (limit of detection = LOD and sensitivity) of the MoS 2 /S@g-CN/GC for the detection of L-TRP using Equations ( 2…”

Section: Sensing Behavior Of Mos 2 /S@g-c 3 N 4 -Modified Electrodementioning

confidence: 95%

See 1 more Smart Citation

MoS2/S@g-CN Composite Electrode for L-Tryptophan Sensing

Niyitanga,

Pathak,

Chaudhary

et al. 2023

Biosensors

View full text Add to dashboard Cite

L-tryptophan (L-TRP) is an essential amino acid responsible for the establishment and maintenance of a positive nitrogen equilibrium in the nutrition of human beings. Therefore, it is vital to quantify the amount of L-tryptophan in our body. Herein, we report the MoS2/S@g-CN-modified glassy carbon electrode for the electrochemical detection of L-tryptophan (L-TRP). The MoS2/S@g-CN composite was successfully synthesized using an efficient and cost-effective hydrothermal method. The physical and chemical properties of the synthesized composite were analyzed using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and energy-dispersive X-ray analysis (EDX). The crystallite size of the composite was calculated as 39.4 nm, with porous balls of MoS2 decorated over the S@g-CN surface. The XPS spectrum confirmed the presence of Mo, S, O, C, and N elements in the sample. The synthesized nanocomposite was further used to modify the glassy carbon (GC) electrode (MoS2/S@g-CN/GC). This MoS2/S@g-CN/GC was used for the electrochemical detection of L-TRP using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. For the purpose of comparison, the effects of the scanning rate and the concentration of L-TRP on the current response for the bare GC, S@g-CN/GC, MoS2/GC, and MoS2/S@g-CN/GC were studied in detail. The MoS2/S@g-CN-modified GC electrode exhibited a rational limit of detection (LoD) of 0.03 µM and a sensitivity of 1.74 µA/ µMcm2, with excellent stability, efficient repeatability, and high selectivity for L-TRP detection.

show abstract

Section: Sensing Behavior Of Mos 2 /S@g-c 3 N 4 -Modified Electrodementioning

confidence: 95%

Section: Sensing Behavior Of Mos 2 /S@g-c 3 N 4 -Modified Electrodementioning

confidence: 95%

MoS2/S@g-CN Composite Electrode for L-Tryptophan Sensing

Niyitanga,

Pathak,

Chaudhary

et al. 2023

Biosensors

View full text Add to dashboard Cite

show abstract

“…Sebastian et al decorated a disposable screen-printed carbon electrode with a zinc cobaltite 3D reduced graphene oxide (rGO) nanocomposite for L-tryptophan detection, claiming a sensor response in the nanomolar range and excellent recovery percentages in dairy products [57]. Recently, Li and coworkers combined a molecularly imprinted poly(o-phenylenediamine) with multi-walled carbon nanotubes (MWCNTs), chitosan and β-cyclodextrin to produce an electrochemical sensor for the enantiomeric detection of L-tryptophan resulting in a limit of detection of 0.5 µM and a good recovery estimation in spiked milk samples [58]. Given the outstanding electrocatalytic properties of MWNCTs [59,60], such excellent material was further exploited in combination with molecular imprinting technology in the work of Yu et al, where a selective electrochemical sensor was constructed for the nanomolar detection of glutamic acid and its sensing in pig serum samples, results that were additionally corroborated by HPLC analysis [61].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of a Molecularly Imprinted Polymer Based on a Novel Thiophene-Derivative for Electrochemical Sensing

Gagliani,

Di Giulio,

Grecchi

et al. 2024

Molecules

View full text Add to dashboard Cite

An environmentally friendly and sustainable approach was adopted to produce a molecularly imprinted polymer (MIP) via electropolymerization, with remarkable electrochemical sensing properties, tested in tyrosine (tyr) detection. The 2,2′-bis(2,2′-bithiophene-5-yl)-3,3′-bithianaphtene (BT2-T4) was chosen as functional monomer and MIP electrosynthesis was carried out via cyclic voltammetry on low-volume (20 μL) screen-printed carbon electrodes (C-SPE) in ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ((BMIM) TFSI). An easy and rapid washing treatment allowed us to obtain the resulting MIP film, directly used for tyr electrochemical detection, carried out amperometrically. The sensor showed a linear response in the concentration range of 15–200 μM, with LOD of 1.04 µM, LOQ of 3.17 μM and good performance in selectivity, stability, and reproducibility. Tyrosine amperometric detection was also carried out in human plasma, resulting in a satisfactory recovery estimation. The work represents the first use of BT2-T4 as a functional monomer for the production of a molecularly imprinted polymer, with a green approach afforded by using a few microliters of a room temperature ionic liquid as an alternative to common organic solvents on screen-printed carbon electrodes, resulting in a valuable system that meets the green chemistry guidelines, which is today an essential criterion in both research and application field.

show abstract

“…PANI, a constituent of the conjugated polymer family, embodies these attributes, being renowned for its ease of synthesis, cost-effectiveness, high electrical conductivity, environmental friendliness, stability, and non-toxic nature [19]. The choice of Leu [20] and Trip [21,22] in this study finds its rationale in their distinct properties [23][24][25]. Leu, an essential amino acid with a hydrophobic side chain, has the potential to enhance the stability of the complex and its interaction with DOP.…”

Section: Introductionmentioning

confidence: 99%

PANI: Ni(Leu)₂ based non-enzymatic electrochemical dopamine sensor

Yıldız,

Baytemir,

Taşaltın

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

In this study, Ni(Leu)2, Zn(Leu)2, Co(Leu)2, Cu(Leu)2, Ni(Trip) , Zn(Trip)2 2, Co(Trip)2, and Cu(Trip)2 were synthesized and used to prepare PANI-based nanocomposites (NCs) via a simple sonochemical method. These NCs were then used to fabricate non-enzymatic electrochemical voltammetric sensors for detecting dopamine (DOP). The results indicate that the PANI: Ni(Leu)2 sensor had a high sensitivity of 28.47 μAμM−1 cm−2 and a limit of detection (LOD) of 9.24 μM, while the PANI: Cu(Trip)2 sensor had a sensitivity of 20.27 μAμM−1 cm−2 and an LOD of 2.21 μM. Due to the use of Ni(Leu)2and Cu(Trip)2 compositions, the DOP detection sensitivity was higher in PANI: Ni(Leu)2 and PANI: Cu(Trip)2 based sensors, which can be explained by an enhanced redox mechanism. The PANI:Ni(Leu)2-based sensor is a particularly promising candidate for application in biomedical test kits due to its rapid detection.

show abstract

Constructing electrochemical sensor using molecular-imprinted polysaccharide for rapid identification and determination of l-tryptophan in diet

Cited by 12 publications

References 38 publications

MoS2/S@g-CN Composite Electrode for L-Tryptophan Sensing

MoS2/S@g-CN Composite Electrode for L-Tryptophan Sensing

Green Synthesis of a Molecularly Imprinted Polymer Based on a Novel Thiophene-Derivative for Electrochemical Sensing

PANI: Ni(Leu)₂ based non-enzymatic electrochemical dopamine sensor

Contact Info

Product

Resources

About

Constructing electrochemical sensor using molecular-imprinted polysaccharide for rapid identification and determination of l-tryptophan in diet

Cited by 12 publications

References 38 publications

MoS2/S@g-CN Composite Electrode for L-Tryptophan Sensing

MoS2/S@g-CN Composite Electrode for L-Tryptophan Sensing

Green Synthesis of a Molecularly Imprinted Polymer Based on a Novel Thiophene-Derivative for Electrochemical Sensing

PANI: Ni(Leu)2 based non-enzymatic electrochemical dopamine sensor

Contact Info

Product

Resources

About

PANI: Ni(Leu)₂ based non-enzymatic electrochemical dopamine sensor