title: Green synthesis of a novel flower-like cerium vanadate microstructure for electrochemical detection of tryptophan in food and biological samples.
abstract: In this present investigation, we introduced a novel electrochemical sensor for the detection of tryptophan (TRP) based on green pompoms flower-like cerium vanadate (CeVO4). The flower-like CeVO4microstructure was prepared by the simple hydrothermal treatment with the assistance of urea for the first time. The as-prepared flower-like CeVO4microstructure was characterized by various analytical and spectroscopic techniques such as X-ray diffraction, Raman spectroscopy fourier transform infrared spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy studies. The electrochemical properties are evaluated by the cyclic voltammetry (CV) and differential pulse voltammetry (DPV). As an electrochemical sensor, the green pompoms flower-like CeVO4modified glassy carbon electrode (GCE) displayed an excellent electrocatalytic activity for the detection of TRP. The obtained electrochemical results revealed that the oxidation of TRP, exhibited a lower potential and higher anodic peak current when compared to unmodified GCE. These results were suggested that the flower-like CeVO4/GCE have a good electrocatalytic activity towards the TRP oxidation. The flower-like CeVO4sensor exhibited the wide linear concentration range and low detection limit of 0.1-94µM and 0.024µM respectively. Finally, the proposed sensor was successfully applied to the determination of TRP in real sample analysis such as food and biological samples with satisfied recoveries.
authors.affiliation: Department of Chemistry, VHNSN College, Virudhunagar 626001, Tamil Nadu, India.
authors.forename: J Vinoth
authors.initials: JV
authors.lastname: Kumar
authors.affiliation: Department of Chemical Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
authors.forename: R
authors.initials: R
authors.lastname: Karthik
authors.affiliation: Department of Chemical Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC. Electronic address: smchen78@ms15.hinet.net.
authors.forename: Shen-Ming
authors.initials: SM
authors.lastname: Chen
authors.affiliation: Department of Chemistry, VHNSN College, Virudhunagar 626001, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Marikkani
authors.affiliation: Department of Chemistry, Thiagarajar College, Madurai 625009, India.
authors.forename: A
authors.initials: A
authors.lastname: Elangovan
authors.affiliation: Department of Chemistry, VHNSN College, Virudhunagar 626001, Tamil Nadu, India. Electronic address: muthuraj75@gmail.com.
authors.forename: V
authors.initials: V
authors.lastname: Muthuraj
mesh_terms: D000818:Animals; D002563:Cerium / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D005504:Food Analysis; D055772:Green Chemistry Technology; D006801:Humans; D057230:Limit of Detection; D008892:Milk / Q000737:chemistry*; D014364:Tryptophan / Q000032:analysis* / Q000652:urine*; D014638:Vanadates / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D002563:Cerium; D014638:Vanadates; D014364:Tryptophan
keywords: Amino acid; Cerium vanadate; Food samples; Green pompoms flower-like; Tryptophan