Graphene Oxide/ZnO Nano Composite for Sensitive and Selective Electrochemical Sensing of Levodopa and Tyrosine Using Modified Graphite Screen Printed Electrode

2016 ◽  
Vol 28 (9) ◽  
pp. 2237-2244 ◽  
Author(s):  
Hadi Beitollahi ◽  
Fariba Garkani Nejad
2020 ◽  
Vol 8 (33) ◽  
pp. 7539-7547
Author(s):  
Xinrui Liu ◽  
Rajalakshmi Sakthivel ◽  
Yu-Cheng Chen ◽  
Ning Chang ◽  
Udesh Dhawan ◽  
...  

We have developed an electrochemical sensor based on integrated 2D materials including SnS2, graphene oxide, and β-cyclodextrin forming a ternary nanocomposite decorated on a screen-printed electrode for the electrochemical detection of melatonin.


Author(s):  
Somayeh Tajik ◽  
Hadi Beitollahi ◽  
Fariba Garkani Nejad ◽  
Mohadeseh Safaei ◽  
Peyman Mohammadzadeh Jahani

Author(s):  
Abolfazl Darroudi ◽  
Saeid Nazari ◽  
Seyed Ali Marashi ◽  
Mahdi Karimi-Nazarabad

Abstract An accurate, rapid, simple, and novel technique was developed to determine simvastatin (SMV). In this research, a screen-printed electrode (SPE) was deposited with graphene oxide (GO) and sodium dodecyl sulfate (SDS), respectively. For the first time, the handmade modified SPE measured the SMV by differential pulse voltammetry (DPV) with high sensitivity and selectivity. The results of cyclic voltammetry indicated the oxidation irreversible process of SMV. Various parameters (pH, concentration, scan rate, support electrolyte) were performed to optimize the conditions for the determination of SMV. Under the optimum experiment condition of 0.1 M KNO3 as support electrolyte and pH 7.0, the linear range was achieved for SMV concentration from 1.8 to 36.6 µM with a limit of detection (LOD), and a limit of quantitation (LOQ) of 0.06 and 1.8 µM, respectively. The proposed method was successfully utilized to determine SMV in tablets and urine samples with a satisfactory recovery in the range of 96.2 to 103.3%.


Nanoscale ◽  
2020 ◽  
Vol 12 (35) ◽  
pp. 18409-18417
Author(s):  
Hadi Eynaki ◽  
Mohammad Ali Kiani ◽  
Hamed Golmohammadi

Herein, we have developed a nanopaper-based screen-printed electrode as a hybrid opto-electrochemical sensing device by taking advantage of the unrivaled physicochemical properties of bacterial cellulose nanopaper in screen printing technology.


2019 ◽  
Vol 19 ◽  
pp. 1183-1188
Author(s):  
Suhaili Sabdin ◽  
Mohd Azraie Mohd Azmi ◽  
Nurul Azurin Badruzaman ◽  
Fatihatul Zuriati Makmon ◽  
Azman Abd Aziz ◽  
...  

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