scholarly journals Electrochemical Preparation of a Molecularly Imprinted Polypyrrole-modified Pencil Graphite Electrode for Determination of Ascorbic Acid

Sensors ◽  
2008 ◽  
Vol 8 (9) ◽  
pp. 5792-5805 ◽  
Author(s):  
Levent Özcan ◽  
Mutlu Sahin ◽  
Yücel Sahin
Keyword(s):  
Ascorbic Acid ◽  
Graphite Electrode ◽  
Pencil Graphite Electrode ◽  
Electrochemical Preparation ◽  
Molecularly Imprinted

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>

Design of An electrochemical platform for Determination of Diclofenac Sodium utilizing a Graphenized Pencil Graphite Electrode Modified with Cu-Al Layered Double Hydroxide/ Chicken Feet Yellow Membrane

2021 ◽  
Author(s):  
Younes Bahadori ◽  
Habib Razmi
Keyword(s):  
Electrochemical Sensor ◽  
Layered Double Hydroxide ◽  
Graphite Electrode ◽  
Diclofenac Sodium ◽  
Pencil Graphite Electrode ◽  
Double Hydroxide

A novel electrochemical sensor based on the Cu-Al layered double hydroxide (Cu-Al LDH) by chicken feet yellow membrane (CFYM) on graphenized pencil graphite electrode (GPGE) was designed. The present modified...

MnO 2 Nanoclusters Decorated on GrapheneModified Pencil Graphite Electrode for Non‐Enzymatic Determination of Cholesterol

2020 ◽  
Vol 32 (10) ◽  
pp. 2128-2136
Author(s):  
Sherin Rison ◽  
K. B. Akshaya ◽  
Vinay S Bhat ◽  
G. Shanker ◽  
T. Maiyalagan ◽  
...  
Keyword(s):  
Graphite Electrode ◽  
Pencil Graphite Electrode ◽  
Enzymatic Determination
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