Simultaneous and selective determination of dopamine and tyrosine in the presence of uric acid with 2D-MoS2 nanosheets modified screen-printed carbon electrodes

FlatChem ◽  
2020 ◽  
Vol 24 ◽  
pp. 100187 ◽  
Author(s):  
Rayhane Zribi ◽  
Ramzi Maalej ◽  
Raymond Gillibert ◽  
Maria G. Donato ◽  
Pietro G. Gucciardi ◽  
...  
Keyword(s):  
Uric Acid ◽  
Carbon Electrodes ◽  
Mos2 Nanosheets ◽  
Selective Determination ◽  
Screen Printed

scholarly journals Voltammetric Determination of Uric Acid in Clinical Serum Samples Using DMF Modified Screen Printed Carbon Electrodes

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Melaku Metto ◽  
Samrawit Eramias ◽  
Bekele Gelagay ◽  
Alemayehu P. Washe
Keyword(s):  
Uric Acid ◽  
Limit Of Detection ◽  
Phosphate Buffer Solution ◽  
Clinical Samples ◽  
Carbon Electrodes ◽  
Current Response ◽  
Serum Samples ◽  
Relative Standard ◽  
Screen Printed

Screen printed carbon electrodes (SPCEs) provide attractive opportunity for sensitive and selective determination target analytes in clinical samples. The aim of the current work was to develop SPCEs based sensor for the determination of uric acid in clinical serum samples. The electrodes were pretreated by soaking in N,N-dimethylformamide for 5 minutes followed by drying in an oven at 100°C for 20 mins. The effect of surface pretreatment was characterized using cyclic voltammetry. The current response of uric acid detection was improved by a factor of 3.5 in differential pulse voltammetric measurement compared to unmodified electrode. Under the optimized conditions, the sensor displayed two dynamic linear ranges 5-100 μM and 100-500 μM with correlation coefficient, R2, values of 0.98782 and 0.97876, respectively. The limit of detection and limit of quantification calculated using the dynamic linear range 5-100 μM were 1.9 x 10−7 M and 6.33 x 10−7 M, respectively. The developed sensor displayed well separated and discerned peaks for UA in presence of the potential interferent (ascorbic acid and citric acid). The electrode was successfully applied for the detection of very low level of UA in clinical serum samples in a phosphate buffer solution (pH = 7). The proposed sensor showed a very high reproducibility and repeatability with the relative standard deviation of 0.9%. In conclusion, a simple and low cost sensor based on SPCEs is developed for sensitive and selective detection of uric acid in clinical samples.

Sensitive and selective determination of hydroxychloroquine in the presence of uric acid using a new nanostructure self-assembled monolayer modified electrode: optimization by multivariate data analysis

The Analyst ◽  
2014 ◽  
Vol 139 (16) ◽  
pp. 4064-4072 ◽  
Author(s):  
Asma Khoobi ◽  
Sayed Mehdi Ghoreishi ◽  
Mohsen Behpour
Keyword(s):  
Uric Acid ◽  
Self Assembly ◽  
Multivariate Data Analysis ◽  
Covalent Modification ◽  
Carbon Electrode ◽  
Self Assembled Monolayer ◽  
Selective Determination ◽  
Highly Sensitive ◽  
Electrochemical Nanosensor

A highly sensitive electrochemical nanosensor was developed using covalent modification of a glassy carbon electrode (GCE) by self-assembly of a novel Schiff base.

Simple Strategy for Selective Determination of Levamisole in Seized Cocaine and Pharmaceutical Samples Using Disposable Screen-printed Electrodes

2018 ◽  
Vol 31 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Raquel G. Rocha ◽  
Jéssica S. Stefano ◽  
Iana V. S. Arantes ◽  
Michelle M. A. C. Ribeiro ◽  
Mario H. P. Santana ◽  
...  
Keyword(s):  
Pharmaceutical Samples ◽  
Selective Determination ◽  
Simple Strategy ◽  
Screen Printed Electrodes ◽  
Screen Printed

Determination of ascorbic acid in serum samples by screen-printed carbon electrodes modified with gold nanoparticles

Talanta ◽  
2017 ◽  
Vol 174 ◽  
pp. 733-737 ◽  
Author(s):  
M. Asunción Alonso-Lomillo ◽  
Olga Domínguez-Renedo ◽  
Abraham Saldaña-Botín ◽  
M. Julia Arcos-Martínez
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Carbon Electrodes ◽  
Serum Samples ◽  
Screen Printed
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