Electrochemical validation of L-tyrosine with dopamine using composite surfactant modified carbon nanotube electrode

Highly Selective and Sensitive Voltammetric Method for the Detection of Catechol in Tea and Water Samples Using Poly(gibberellic acid)-Modified Carbon Paste Electrode

“…In this reversible process, we calculated the electroactive surface area by using the Randle–Sevcik equation 20 where I p is the anodic peak current in amperes attained for K 4 [Fe(CN) 6 ], n is the number of electrons involved in the reversible process, A is the electroactive surface area in cm 2 , D is the diffusion coefficient in cm 2 s –1 , C is the concentration of K 4 [Fe(CN) 6 ] in mol cm –3 , and ν is the scan rate in V s –1 .…”

Electrochemical Determination of Riboflavin using a Poly(Titan Yellow) Modified Carbon Nanotube Paste Electrode in the Presence of Dopamine

“…Later the electrode was fabricated with polymer, and the improved and sharp redox peaks were observed for K 4 [Fe(CN) 6 with great electrical conductivity, greater surface area, and quantum impact of polymer. The respective electrochemical surface area of the electrodes was calculated using the Randles‐Sevcik equation: I p =2.69×10 5 n 3/2 A D 1/2 C υ 1/2 [31,32] . Where, A: electrochemical active surface area (cm 2 ), I p : analyte peak current (A), D: analyte diffusion coefficient (cm 2 /s), n: number of electrons, υ: scan rate (V/s) and C: analyte concentration (M).…”

“…Based on the peak currents and concentration the graph of I pa v/s [RF] (Figure 7b) was demonstrated and it exposes a decent linear correlation among concentration and oxidation peak current of RF in the range from 4.0 to 50.0 μM and the linear regression equation is, I pa (A)=7.969×10 −6 +1.293 [RF] (M) (R 2 =0.9944). The values of LOD and LOQ are premeditated through LOD=3S/M and LOQ=10S/M relations [31] . Here, S: standard deviation of blank and M: the slope of the calibration plot.…”

“…The redox action of RF was examined by varying the concentration in the range from 4.0 to 100.0 μM in 0.2 M PBS The values of LOD and LOQ are premeditated through LOD = 3S/M and LOQ = 10S/M relations. [31] Here, S: standard deviation of blank and M: the slope of the calibration plot. The attained values of LOD and LOQ are found to be 2.679 × 10 À 8 M and 8.932 × 10 À 8 M, correspondingly.…”

“…The respective electrochemical surface area of the electrodes was calculated using the Randles-Sevcik equation: I p = 2.69 × 10 5 n 3/2 A D 1/2 C υ 1/2 . [31,32] Where, A: electrochemical active surface area (cm 2 ), I p : analyte peak current (A), D: analyte diffusion coefficient (cm 2 /s), n: number of electrons, υ: scan rate (V/s) and C: analyte concentration (M). The calculated electrochemical surface areas for PTYMCNTPE and BCNTPE are attained to be 0.039 cm 2 and 0.013 cm 2 , individually.…”