A voltammetric sensor based on reduced graphene oxide-hemin-Ag nanocomposites for sensitive determination of tyrosine

Abstract

A novel electrochemical sensor for the sensitive determination of l-Tyr was designed with a rGO-H-Ag nanocomposite modified electrode.

A comprehensive review on recent trends in amino acids detection through analytical techniques

“…To estimate the L‐Tyr, CV, and DPV were utilized. According to the results; the electrochemical oxidation of L‐Tyr was found to be significantly increased at the modified electrode made of nanocomposites [45].…”

An electrochemical platform based on a hemin–rGO–cMWCNTs modified aptasensor for sensitive detection of kanamycin

“…Hemin-functionalized reduced graphene oxide (hemin–rGO) was obtained by π–π interactions between rGO and hemin. 16,17 In order to achieve better conductivity and more binding sites, cMWCNTs were doped into hemin–rGO. 18 According to this strategy, hemin–rGO–cMWCNTs, an aptamer carrier material with good conductivity and biocompatibility, was prepared and modified on the electrochemistry sensor.…”

Poly L- methionine/Electrochemically Reduced Graphene Oxide Composite Film Modified Glassy Carbon Electrode for the Simultaneous Determination of 5-hydroxyindole Acetic Acid and Tyrosine

“…Several techniques such as High-Performance Liquid Chromatography (HPLC), Gas Chromatography (GC), Liquid Chromatography-Mass Spectrometry (LC-MS), Chromatography combined with electrochemical and fluorescence detection and immunoassays have been emerged for the detection of 5-HIAA and Tyr. 6,[12][13][14][15][16] The disadvantages of opting these methods include the requirement of costly and sophisticated instruments, use of excess solvents, time consuming pre-treatment, highly skilled operational personnel etc. 17 There is a need of new systems with minimal sample pre-treatment, short analysis time, long-term stability and low cost with great analytical performance.…”

“…Mostly used electrochemical methods for the determination of 5-HIAA and Tyr are voltammetry, chronoamperometry and Electrochemical Impedance Spectroscopy (EIS). 11,16,28,29 Since voltametric technique provides fast response and better sensitivity, it was opted for determination of 5-HIAA and Tyr in this work. 16,30,31 Electro polymerisation of amino acids provide catalytic effect in some electrochemical processes and thus support the transducer electrodes to achieve lower detection limits.…”

“…11,16,28,29 Since voltametric technique provides fast response and better sensitivity, it was opted for determination of 5-HIAA and Tyr in this work. 16,30,31 Electro polymerisation of amino acids provide catalytic effect in some electrochemical processes and thus support the transducer electrodes to achieve lower detection limits. 32 Electro polymerisation of L-methionine (L-met) initiate via attachment of free radical of N on GCE surface followed by polymerisation of the amino acid, which provides bio-compatibility to the electrode.…”