scholarly journals Selective Determination of Epinephrine in the Presence of Ascorbic Acid Using a Glassy Carbon Electrode Modified with Graphene

2012 ◽  
Vol 28 (2) ◽  
pp. 147 ◽  
Author(s):  
Xia LI ◽  
Meifeng CHEN ◽  
Xinying MA
Keyword(s):  
Ascorbic Acid ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Selective Determination

MoSx–Co3O4 Nanocomposite for Selective Determination of Ascorbic Acid

2021 ◽  
Vol 21 (4) ◽  
pp. 2595-2603
Author(s):  
Sidra Amin ◽  
Aneela Tahira ◽  
Amber Solangi ◽  
Ayman Nafady ◽  
Zafar Hussain Ibupoto
Keyword(s):  
Ascorbic Acid ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Limit Of Detection ◽  
Active Surface Area ◽  
Carbon Electrode ◽  
Selective Determination ◽  
Practical Applications ◽  
Wide Range

Designing a nanocomposite with sensitive and selective determination of ascorbic acid is challenging task. It is possible through the exploitation of attractive features of nanoscience and nanotechnology for the synthesis of nanostructured materials. Herein, we report the decoration of nanoparticle of MoSx on the surface of Co3O4 nanowires by hydrothermal method. The MoSx nanoparticles shared the large surface on the Co3O4 nanowires, thus it supported in the development enzyme free ascorbic acid sensor. Non-enzymatic sensor based on MoSx-Co3O4 composite was found very selective for the determination of ascorbic acid (AA) in phosphate buffer solution of pH 7.4. The MoSx-Co3O4 nanocomposite was used to modify the glassy carbon electrode to measure AA from variety of practical samples. The MoSx-Co3O4 nanocomposite was used to modify the glassy carbon electrode and it has shown the attractive analytical features such as a low working potential +0.3 V, linear range of concentration from 100–7000 μM, low limit of detection 14 μM, and low limit of quantification (LOQ) of 42 μM. The developed sensor is highly selective and stable. Importantly, it was applied successfully for the practical applications such as detection of AA from grapefruit, tomato and lemon juice. The excellent electrochemical properties of fabricated MoSx-Co3O4 nanocomposite can be attributed to the increasing electro active surface area of MoSx. The presented nanocomposite is earth abundant, environment friendly and inexpensive and it holds promising features for the selective and sensitive determination of AA from practical applications. The nanocomposite can be capitalized into the wide range of biomedical applications.

A new class of electropolymerized conducting film from the pyrimidine family for the simultaneous determination of ascorbic acid and dopamine

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97391-97398 ◽  
Author(s):  
Ayyadurai Kannan ◽  
Arumugam Sivanesan ◽  
Govindasamy Kalaivani ◽  
Ranganathan Sevvel
Keyword(s):  
Ascorbic Acid ◽  
Simultaneous Determination ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Conducting Film ◽  
Selective Determination ◽  
New Class

We report the electropolymerization of 4-amino-6-hydroxy-2-mercaptopyrimidine on a glassy carbon electrode and its application for simultaneous as well as the selective determination of ascorbic acid and dopamine at pH 4.

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