Determination of Tyrosine in Artificial Urine Using a Screen- Printed Electrode Modified with tetrathiafulvalene−tetracyanoquinodimethane/ionic Liquid Conductive Gel

2020 ◽  
pp. 9179-9190
Author(s):  
Xiaoping Zhang ◽  
Keyword(s):  
Ionic Liquid ◽  
Screen Printed Electrode ◽  
Artificial Urine ◽  
Screen Printed

Wide electrochemical window of screen-printed electrode for determination of rapamycin using ionic liquid/graphene composites

2020 ◽  
Vol 187 (4) ◽  
Author(s):  
Sudkate Chaiyo ◽  
Sakda Jampasa ◽  
Natnicha Thongchue ◽  
Eda Mehmeti ◽  
Weena Siangproh ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Screen Printed Electrode ◽  
Electrochemical Window ◽  
Screen Printed

scholarly journals Determination of Simvastatin by Voltammetry Method at Screen-Printed Electrode Modified by Graphene Oxide Nanosheets and Sodium Dodecyl Sulfate

2022 ◽  
Author(s):  
Abolfazl Darroudi ◽  
Saeid Nazari ◽  
Seyed Ali Marashi ◽  
Mahdi Karimi-Nazarabad
Keyword(s):  
Graphene Oxide ◽  
Sodium Dodecyl Sulfate ◽  
Limit Of Detection ◽  
Sodium Dodecyl ◽  
Screen Printed Electrode ◽  
Support Electrolyte ◽  
Limit Of Quantitation ◽  
Dodecyl Sulfate ◽  
Screen Printed

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%.

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