Simple and sensitive electrochemical determination of higenamine in dietary supplements using a disposable pencil graphite electrode

Pınar, Pınar Talay; Yardım, Yavuz; Şentürk, Zühre

doi:10.1007/s00706-020-02556-y

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…The equation shows that we have obtained data close to 0.5 theoretical value, which refers to diffusion‐controlled processes [37] …”

Section: Resultssupporting

confidence: 72%

“…The equation shows that we have obtained data close to 0.5 theoretical value, which refers to diffusion-controlled processes. [37] By using the square wave voltammetry (SWV) technique, which is an important method used in determining organic molecules, sharper and well-defined peaks of DA have been obtained. The effect of pH changing on DA's peak current was studied in the pH range 3.0-8.0 of 0.1 M Britton-Robinson buffer (Figure 10a) on a 0.5 μg mL À 1 DA solution + 0.0 and + 1.0 V.…”

Section: Electrochemical Behavior Of Dopamine At the Mwcnts-nh-b(oh) 2 /Gc Electrodementioning

confidence: 99%

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Nanotube‐Boramidic Acid Derivative for Dopamine Sensing

et al. 2021

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A new sensor, based on boramidic acid-bounded MWCNTs (Multi-walled carbon nanotubes), was synthesized in three simple steps. Modification of the sensor surface was accomplished using boric acid in which the boron atom is adjacent to the NH group. Characterization, electrochemical behaviors, and stability of newly modified nanosensor were completed using SEM (scanning electron microscope), TEM (Transmission electron microscope), CV (cyclic voltammetry), EIS (electron impedance), DTA (Differential thermal analysis), and XPS (X-ray photoelectron spectroscopy). SEM and TEM analysis were confirmed the modified surface of the nanosensor. The stability of the newly synthesized sensor was also designated that the initial weight loss occurred between 50-145°C was corre-sponded to the degradation of both ethylene diamine and boric acid. According to the EIS study, the Nyquist plot of the MWCNTs-NH-B (OH) 2 /GC electrode displayed a 0.435 kΩ Rct with a smaller semicircle than the bare GC (6.57 kΩ). The electrochemical behavior of dopamine was investigated using cyclic and square wave voltammetry (0.1 M phosphate buffer solution-pH 7.4). The diffusion-controlled process was determined when the oxidation of dopamine was studied. The detection limit of dopamine was found to be 5.1 nM. An actual sample study was done using the developed analytical method, and the detection of dopamine in urine was successfully performed. This study is the first example of boramidic acidmodified multi-walled carbon nanotubes

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“…The equation shows that we have obtained data close to 0.5 theoretical value, which refers to diffusion‐controlled processes [37] …”

Section: Resultssupporting

confidence: 72%

Section: Electrochemical Behavior Of Dopamine At the Mwcnts-nh-b(oh) 2 /Gc Electrodementioning

confidence: 99%