Combination of a poly(3,4-ethylene-dioxythiophene) electrode in the presence of sodium dodecyl sulfate with centri-voltammetry

Tepeli, Yudum; Aslan, Sema; Sezer, Esma; Anık, Ülkü

doi:10.1039/c5ay01749a

Cited by 9 publications

(9 citation statements)

References 44 publications

(95 reference statements)

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“…As mentioned before, carrier materials have been used in centri‐voltammetry before . The aim here is to carry the analyte onto the electrode surface more effectively.…”

Section: Resultsmentioning

confidence: 99%

“…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%

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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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“…As mentioned before, carrier materials have been used in centri‐voltammetry before . The aim here is to carry the analyte onto the electrode surface more effectively.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Centri‐Voltammetric Folic Acid Detection

2019

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“…For the sample application, the developed system was applied for CEA and VEGF biomarkers detection in synthetically prepared plasma samples [27].…”

Section: The Effect Of Interfering Substances and The Sample Applicationmentioning

confidence: 99%

Electro‐nano Diagnostic Platforms for Simultaneous Detection of Multiple Cancer Biomarkers

et al. 2017

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In this study, a bimetallic nanomaterial‐based electrochemical immunosensor was developed for the detection of carcinoembryonic antigen (CEA) and vascular endothelial growth factor (VEGF) cancer biomarkers at the same time. CEA and VEGF biomarkers are indicators for colon and breast cancers and stomach cancers, respectively. During the study, gold nanoparticle (AuNp), lead nanoparticle (PbNp), copper nanoparticle (CuNp) and magnetic gamma iron(III)oxide (γFe2O3 Np) were synthesized, characterized and used together for the first time in the structure of an electrochemical biosensor based on anti‐CEA and anti‐VEGF. For this purpose, Au SPE based sandwich immunosensor was fabricated by using labeled anti‐CEA (labeled with Pb+2) and labeled anti‐VEGF (labeled with Cu+2). As a result, CEA and VEGF biomarkers were detected following the oxidation peaks of label metals (Pb+2 and Cu+2) by using differential pulse voltammetry. After the experimental parameters were optimized, the linear range was found in the concentration range between 25 ng/mL and 600 ng/mL with the relative standard deviation (RSD) value of (n=3 for 600 ng/mL) 3.33 % and limit of detection (LOD) value of 4.31 ng/mL for CEA biomarker. On the other hand, the linear range was found in the concentration range between 0.2 ng/mL and 12.5 ng/mL with the RSD value of (n=3 for 12.5 ng/mL) 5.31 % and LOD value of 0.014 ng/mL for VEGF biomarker. Lastly, sample application studies for synthetic plasma sample and interference studies with dopamine, ascorbic acid, BSA, cysteine and IgG were carried out.

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“…The novelty of the technique is based on the combination of centrifugation and direct voltammetric scan in a single voltammetric cell which results in the preconcentration of the analyte onto the electrode surface by means of centrifugal force. [15][16][17][18][19][20][21][22][23][24][25][26] Besides the centrifugation of the analyte itself, suitable carrier reagents may be used to precipitate the analyte onto the electrode surface. 15,16,21,23,26 Until now, the technique has been successfully applied to the determination of several biologically important molecules like xanthine, 18 acetylthiocholine, 19 acetylcholine, choline, 20 glutathione 21 and dopamine.…”

Section: Introductionmentioning

confidence: 99%