Preparation of poly(3,4-ethylenedioxythiophene) nanofibers modified pencil graphite electrode and investigation of over-oxidation conditions for the selective and sensitive determination of uric acid in body fluids

2015 ◽  
Vol 891 ◽  
pp. 312-320 ◽  
Author(s):  
Ali Özcan ◽  
Salih İlkbaş
Keyword(s):  
Uric Acid ◽  
Graphite Electrode ◽  
Body Fluids ◽  
Pencil Graphite Electrode ◽  
Sensitive Determination

Determination of uric acid in biological samples on the pretreated pencil graphite electrode

2012 ◽  
Vol 4 (8) ◽  
pp. 2288 ◽  
Author(s):  
Esmaeel Alipour ◽  
Mir Reza Majidi ◽  
Afsaneh Saadatirad ◽  
Sayed Mahdi Golabi
Keyword(s):  
Uric Acid ◽  
Biological Samples ◽  
Graphite Electrode ◽  
Pencil Graphite Electrode

scholarly journals In situ polymerization and FT-IR characterization of poly-glycine on pencil graphite electrode for sensitive determination of anti-emetic drug, granisetron in injections and human plasma

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4325-4335 ◽  
Author(s):  
Marwa F. B. Ali ◽  
Fatma A. M. Abdel-aal
Keyword(s):  
Human Plasma ◽  
In Situ Polymerization ◽  
Graphite Electrode ◽  
Modified Electrodes ◽  
Pencil Graphite Electrode ◽  
Ft Ir ◽  
Sensitive Determination

In situ polymerization is a simple and efficient technique for modification and fabrication of modified electrodes in voltammetry.

scholarly journals Affordable voltammetric sensor based on anodized disposable pencil graphite electrodes for sensitive determination of dopamine and uric acid in presence of high concentration of ascorbic acid

2020 ◽  
Author(s):  
Preethi Sankaranarayanan ◽  
Sangaranarayanan V. Venkateswaran
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphite Electrode ◽  
Limit Of Detection ◽  
Simultaneous Detection ◽  
Pencil Graphite Electrode ◽  
Voltammetric Sensor ◽  
High Concentration ◽  
Graphite Electrodes

<p class="PaperAbstract">A simple, disposable and low - cost voltammetric sensor based on the anodized pencil graphite electrode (APGE) for the simultaneous determination of dopamine (DA) and uric acid (UA) is demonstrated. The physico-chemical properties of the pencil graphite electrode (PGE) before and after anodization were analyzed using FT-IR, FT-Raman, SEM and EIS characterization techniques. In comparison to PGE, APGE exhibited excellent electrochemical activity towards the simultaneous detection of DA and UA with peak-to-peak separation of about 0.18 V even in the presence of high concentration (2 mM) of ascorbic acid (AA). The discrimination of APGE towards AA was rationalized through the absence of favorable surface interactions between oxygen rich functional groups on the surface of APGE and AA. Using DPV without any pre-concentration step and under optimized conditions, APGE displayed a linear range of 1 – 80 μM with an estimated limit of detection (LOD, 3σ/m) of 0.008 μM and 0.014 μM for DA and UA, respectively. Moreover, a higher sensitivity in comparison to other previously reported pretreated pencil graphite electrodes was observed for DA (34.32 μA/μM) and UA (12.33 μA/μM). The practical applicability of APGE was demonstrated through the estimation of DA in human blood serum and UA in urine samples.</p>

Simultaneous determination of dopamine and uric acid in biological samples on the pretreated pencil graphite electrode

2013 ◽  
Vol 91 ◽  
pp. 36-42 ◽  
Author(s):  
Esmaeel Alipour ◽  
Mir Reza Majidi ◽  
Afsaneh Saadatirad ◽  
Sayed mahdi Golabi ◽  
Ali Mohammad Alizadeh
Keyword(s):  
Uric Acid ◽  
Simultaneous Determination ◽  
Biological Samples ◽  
Graphite Electrode ◽  
Pencil Graphite Electrode
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