Simultaneous electrochemical determination of dopamine and ascorbic acid using poly (l-serine) modified carbon paste electrode

Electrosynthesis of Poly(alanine)-Like Peptides in Concentrated Alanine Based Electrolytes, Characterization Coupled to DFT Study and Application to pH Proton Receptor

“…Anodic oxidation peaks for diluted L-alanine are observed at around 1.75 V and 2.10 V while they are at 1.95 and 2.55 V respectively for concentrated L-alanine. This increase of peak potentials with increasing concentration of L-alanine is in agreement with results from S. Chitravathi et al 32 In addition, the current value decreases with increasing number of cycles, indicating that a passivation reaction occurs on the electrodes surface. 13 , 33,34 To better understand the chemical nature of the coating obtained from the anodic oxidation of concentrated zwitterion based electrolyte, we carried out spectroscopic characterizations such as ATR-IR and XPS.…”

Simultaneous electroanalysis of norepinephrine, ascorbic acid and uric acid using poly(glutamic acid) modified carbon paste electrode

“…During the last few decades the modification of electrode by the application of electropolymerization technique is of great importance in constructing electrochemical sensors and biosensors because of their practical advantages such as selectivity, good reproducibility, electrochemical reversibility, stability, and low cost [23][24][25]. In support to this there are so many literatures on the usage of these modified electrodes for the qualitative and quantitative determination of catecholamine's [26][27][28]. The present work demonstrates the fabrication of a stable and selective electrode by electropolymerising L-glutamic acid at the BCPE using cyclic voltammetric technique.…”

Sodium Alpha Olefin Sulfonate Modified Carbon Paste Electrode Sensor for Dopamine: A Voltammetric Study

“…As the concentration of DA was increased, the anodic and cathodic peak currents also increases and the plot of I pa versus DA concentration shows increase in electrochemical peak currents with linear regression equation I pa (µA)=2.840 × 10 -5 (C) M/L+5.3776 (µA) (R 2 =0.9913) as shown in the Figure 5b. The detection limit was calculated by using the formula (1) [56], where S is the standard deviation and M is the slope obtained from the calibration plots. The detection limit for dopamine was found to be 1.05 × 10 -6 M. …”