Electrochemically Recognizing Tryptophan Enantiomers based on Carbon Black/Poly-l-Cysteine Modified Electrode

2019 ◽  
Vol 166 (13) ◽  
pp. B1226-B1231 ◽  
Author(s):  
Odoom Jibrael Kingsford ◽  
Depeng Zhang ◽  
Yuzhi Ma ◽  
Yuntao Wu ◽  
Gangbing Zhu
Keyword(s):  
Carbon Black ◽  
Modified Electrode ◽  
Tryptophan Enantiomers

Sensitive Voltammetric Determination of Ethinyl Estradiol on Carbon Black Modified Electrode

2017 ◽  
Vol 164 (13) ◽  
pp. H885-H889 ◽  
Author(s):  
Joanna Smajdor ◽  
Robert Piech ◽  
Magdalena Pięk ◽  
Beata Paczosa-Bator
Keyword(s):  
Carbon Black ◽  
Modified Electrode ◽  
Ethinyl Estradiol ◽  
Voltammetric Determination

scholarly journals Highly Sensitive Levodopa Determination by Means of Adsorptive Stripping Voltammetry on Ruthenium Dioxide-Carbon Black-Nafion Modified Glassy Carbon Electrode

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 60
Author(s):  
Anna Górska ◽  
Beata Paczosa-Bator ◽  
Robert Piech
Keyword(s):  
Carbon Black ◽  
Glassy Carbon Electrode ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Tap Water ◽  
Pharmaceutical Products ◽  
Carbon Electrode ◽  
Step Potential ◽  
Voltammetric Method ◽  
Highly Sensitive

A new, highly sensitive Adsorptive Stripping Voltammetric method for levodopa determination was developed. As a working electrode, the glassy carbon electrode (GCE) modified with carbon black (CB), RuO2·xH2O (RuO2) and Nafion was used (CB-RuO2-Nafion GCE). Levodopa signal obtained on the modified electrode was 12 times higher compared to GCE. During research, instrumental parameters were optimized: sampling time ts = 10 ms, waiting time tw = 10 ms, step potential Es = 5 mV and pulse amplitude ΔE = 50 mV. Preconcentration potential Eprec was equal to 0 mV. The best results were obtained in 0.025 M perchloric acid (approx. pH 1.4). Signal repeatability measured on the CB-RuO2-Nafion modified electrode for 0.2 µM of levodopa was equal to 2.1% (levodopa concentration 1 µM, n = 5). Linearity of the method was achieved in the concentration range from 1 to 8 µM. Limit of detection was equal to 17 nM. Recoveries calculated for pharmaceutical products and tap water measurements were in the range 102–105%, which confirms the accuracy of the developed. The applicability of the method was confirmed by analysis of pharmaceutical products and tap water samples. Based on obtained results, it might be concluded that the developed voltammetric method could be a useful tool in routine drug analysis.

Chiral Recognition of Tryptophan Enantiomers Based on β-Cyclodextrin-platinum Nanoparticles/Graphene Nanohybrids Modified Electrode

2015 ◽  
Vol 28 (4) ◽  
pp. 868-873 ◽  
Author(s):  
Juanjuan Xu ◽  
Qinghong Wang ◽  
Chunzhi Xuan ◽  
Qiao Xia ◽  
Xia Lin ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Platinum Nanoparticles ◽  
Chiral Recognition ◽  
Tryptophan Enantiomers

Selective and low potential electrocatalytic oxidation and sensing of l-cysteine using metal impurity containing carbon black modified electrode

2017 ◽  
Vol 9 (48) ◽  
pp. 6791-6800 ◽  
Author(s):  
Sundaram Sornambikai ◽  
Mohammed Rafiq Abdul Kadir ◽  
Annamalai Senthil Kumar ◽  
Nagamony Ponpandian ◽  
Chinnuswamy Viswanathan
Keyword(s):  
Carbon Black ◽  
Functional Groups ◽  
Modified Electrode ◽  
Electrocatalytic Oxidation ◽  
Metal Impurity ◽  
Metal Impurities ◽  
Oxygen Functional Groups

Cartoon for the GCE/CB modified electrode preparation and its low potential electrocatalytic oxidation of l-CySH with assistance of metal impurities and oxygen functional groups.

Electroanalysis of Iron in Groundwater by Defective Carbon Black Modified Electrode

2021 ◽  
Vol 49 (6) ◽  
pp. e21112-e21117
Author(s):  
Jing-Wen QU ◽  
Ping SONG ◽  
Xue GONG ◽  
Ming-Bo RUAN ◽  
Wei-Lin XU
Keyword(s):  
Carbon Black ◽  
Modified Electrode
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