Centri-voltammetric determination of glutathione

Çubukçu, Meliha; Ertaş, F. Nil; Anık, Ülkü

doi:10.1007/s00604-012-0910-6

Cited by 25 publications

(25 citation statements)

References 53 publications

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“…Several methods have been reported for the determination of GSH. These, include chemiluminescence 18 , High Performance Liquid Chromatography (HPLC) [19][20][21] , capillary electrophores [22][23][24][25][26] , derivatization methods 27 , liquid chromatography-tandem mass spectrometry (LC-MS/MS) 28 , liquid chromatography -electrospray mass spectrometric (HPLC-ESI-MS) 29 , liquid chromatography-Electrochemical Method [30][31][32] , Electrochemical methods provide useful alternatives since they allow faster, cheaper and safer analysis [33][34][35][36][37][38][39][40] .…”

Section: Oriental Journal Of Chemistrymentioning

confidence: 99%

A Sensitive Voltammetric Sensor for Determination of Glutathione Based on Multiwall Carbon Nanotubes Paste Electrode Incorporating Pyrogallol Red

Keyvanfard¹,

Alizad²

2014

Orient. J. Chem.

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A new sensitive and selective electrochemical sensor was developed for determination of glutathione (GSH) at the surface of carbon paste electrode (CPE) modified with multi-wall carbon nanotubes (MWCNTs) as a sensor and pyrogallol red (PGR) as a mediator. The mechanism of GSH electrochemical behavior at the modified electrode surface was investigated by various electrochemical techniques including chronoamperometry, cyclic voltammetry (CV) and square wave voltammetry (SWV). A linear calibration curve was obtained in the concentration range of GSH of 0.3-500 µmol L -1 , with a limit of detection of 0.19 µmol L -1 . The method was applied to the determination of GSH in urine samples with satisfactory results.

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Section: Oriental Journal Of Chemistrymentioning

confidence: 99%

A Sensitive Voltammetric Sensor for Determination of Glutathione Based on Multiwall Carbon Nanotubes Paste Electrode Incorporating Pyrogallol Red

Keyvanfard¹,

Alizad²

2014

Orient. J. Chem.

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“…By applying centrifuga-tion, the analyte is deposited onto the electrode surface and without engaging any separation techniques, the analyte's redox behaviour is monitored voltammetrically [28]. Up to now, metallic substances [29,30] together with biologically important analytes [31,32,33,34,35] were detected by this method. Also, the electrode was modified with suitable enzymes [36,37] or cell lines [38] and various biocentri-voltammetric methods were developed.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the electrode was modified with suitable enzymes [36,37] or cell lines [38] and various biocentri-voltammetric methods were developed. This method can be applied with [30,34,39,40] or without [29,[31][32][33][36][37][38] a carrier material. As mentioned above, in the present study, an accumulation step followed by a stripping step included centri-voltammetry was applied for FA detection.…”

Section: Introductionmentioning

confidence: 99%

Centri‐Voltammetric Folic Acid Detection

2019

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The need for practical detection of folic acid (FA) has been increased day by day. For this reason in this work, a two steps electroanalytical technique, centri‐voltammetry was utilized for FA detection for the first time. In order to get rid of the slow electrode kinetics of FA oxidation, the working electrode was modified with graphene‐Pt hibrid nanomaterial. Also for increasing the sensitivity, 1‐Chloro‐2‐[2‐(2‐methoxyethoxy) ethoxy]ethane (TEG−Cl) and 1,2‐di{2‐[2‐(2‐methoxyethoxy)ethoxy] ethoxy}‐4‐nitrobenzene (4NC−NO2) was used as a carrier material. After the characterization of graphene‐Pt hybrid nanomaterial, experimental parameters like, 4NC−NO2 amount, adsorption time, centri‐voltammetric parameters like centrifuge time and speed were optimized. After that, analytical characteristics such as linear range, relative standard deviation (R.S.D), limit of detection (LOD) and limit of quantification (LOQ) values were found. In this manner, linear range was obtained for FA between 1.0 μM–1000 μM with the equations of y=0.0108x+1.0459 (R2=0.9977). R.S.D value was calculated for 0.83 mM FA (n=3) as 1.86 % while LOD and LOQ values were found as 1.00 μM and 3.34 μM respectively. After the examination of interference effect of substances like ascorbic acid and uric acid, established centri‐voltammetric technique was enforced for FA detection in pharmateutical tablets. As a result, the recovery value was calculated as 96.4 %.

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“…Besides their electrocatalytic activity, they also have high electrical conductivity that allows their usage as electrode material. [6][7][8][9][10]. CNT modified electrodes show low detection limits, increased sensitivity and reduced overpotential for the detection of some compounds such as dopamine [11], glucose [12,13], epinephrine [14] hydrogen peroxide [15] and xanthine [16].…”

Section: Introductionmentioning

confidence: 99%

Poly(allylamine hydrochloride) Functionalized Multiwalled Carbon Nanotube Modified Carbon Paste Electrode as Acetylcholinesterase Biosensor Transducer

2013

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In this work, a sensitive, practical and reliable acetylthiocholine (ATCh) biosensor based on poly(allylamine hydrochloride) functionalized multiwalled carbon nanotube (PAH/MWCNT) was fabricated and used for pesticide detection. As far as we know, this is the first work that constitutes the usage of PAH and MWCNT for ATCh biosensor. The developed system was characterized by using scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry. The influence of parameters such as enzyme amount and pH were examined and a linearity between 5 10 À5 MÀ2.0 10 À3 M for ATCh was obtained. The proposed biosensor was applied for a model pesticide, monocrotophos, detection. The analytical curve showed an excellent linearity in the monocrotophos concentration range of 1-25 pg/mL with an incubation time of 5 min. Limit of detection and limit of quantification values were calculated as 0.88 and 2.9 pg/mL, respectively. The system was also applied for detection of monocrotophos in grape, tomatoe, tap and mineralized water samples and promising recovery values were obtained.

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Centri-voltammetric determination of glutathione

Cited by 25 publications

References 53 publications

A Sensitive Voltammetric Sensor for Determination of Glutathione Based on Multiwall Carbon Nanotubes Paste Electrode Incorporating Pyrogallol Red

A Sensitive Voltammetric Sensor for Determination of Glutathione Based on Multiwall Carbon Nanotubes Paste Electrode Incorporating Pyrogallol Red

Centri‐Voltammetric Folic Acid Detection

Poly(allylamine hydrochloride) Functionalized Multiwalled Carbon Nanotube Modified Carbon Paste Electrode as Acetylcholinesterase Biosensor Transducer

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