Highly sensitive simultaneous electrochemical determination of reduced and oxidized glutathione in urine samples using antimony trioxide modified carbon paste electrode

2020 ◽  
Vol 318 ◽  
pp. 128141
Author(s):  
Zorica S. Stojanović ◽  
Ana D. Đurović ◽  
Amir M. Ashrafi ◽  
Zuzana Koudelková ◽  
Ondřej Zítka ◽  
...  
Keyword(s):  
Carbon Paste Electrode ◽  
Electrochemical Determination ◽  
Modified Carbon Paste Electrode ◽  
Antimony Trioxide ◽  
Oxidized Glutathione ◽  
Carbon Paste ◽  
Highly Sensitive ◽  
Reduced And Oxidized Glutathione ◽  
Paste Electrode

Sensitive Electrochemical Determination of Hyperin Based on Electrochemically Activated ZrO2 Nanoparticles-Modified Carbon Paste Electrode

NANO ◽  
2019 ◽  
Vol 14 (05) ◽  
pp. 1950052 ◽  
Author(s):  
Na Wang ◽  
Jianyao Kou ◽  
Lijie Wang ◽  
Fei Wang ◽  
Kui Lu
Keyword(s):  
Carbon Paste Electrode ◽  
Electrochemical Treatment ◽  
Electrochemical Determination ◽  
Zro2 Nanoparticles ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
X Ray Diffraction ◽  
Sensitive Determination ◽  
Paste Electrode

A novel electrochemically activated ZrO2 nanoparticles modified carbon paste electrode (CPE) (ZrO2-CPE(ox)) was prepared and applied for selective and sensitive determination of hyperin. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectra and electrochemical experiment were used to characterize the ZrO2 nanoparticles and investigate the electrochemical performance of the ZrO2-CPE(ox). Compared with bare CPE and electrochemically activated CPE (CPE(ox)), the ZrO2-CPE(ox) got more reactive sites by electrochemical treatment and exhibited larger effective surface area and more excellent electrochemical catalytic activity toward the redox of hyperin. Under the optimum conditions, the oxidation peak currents showed a linear relationship with the concentrations of hyperin in the range of [Formula: see text]–[Formula: see text][Formula: see text]mol[Formula: see text]L[Formula: see text] and [Formula: see text]–[Formula: see text][Formula: see text]mol[Formula: see text]L[Formula: see text], and a low detection limit of [Formula: see text][Formula: see text]mol[Formula: see text]L[Formula: see text] was achieved for hyperin. Moreover, the proposed method exhibited an excellent selectivity, stability, reproducibility and repeatability, which make it very suitable for a potential choice for determining the concentrations of hyperin in drug matrices.

Electrochemical determination of vitamin C in the presence of uric acid by a novel TiO2 nanoparticles modified carbon paste electrode

2010 ◽  
Vol 21 (12) ◽  
pp. 1471-1474 ◽  
Author(s):  
Mohammad Mazloum-Ardakani ◽  
Mohammad Ali Sheikh-Mohseni ◽  
Hadi Beitollahi ◽  
Ali Benvidi ◽  
Hossein Naeimi
Keyword(s):  
Uric Acid ◽  
Vitamin C ◽  
Tio2 Nanoparticles ◽  
Carbon Paste Electrode ◽  
Electrochemical Determination ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Paste Electrode
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