Selective Determination of Total Capsaicinoids in Plant Material Using Poly(Gallic Acid)-modified Electrode

2018 ◽  
Vol 31 (2) ◽  
pp. 222-230 ◽  
Author(s):  
Guzel Ziyatdinova ◽  
Ekaterina Kozlova ◽  
Herman Budnikov ◽  
Rustam Davletshin
Keyword(s):  
Gallic Acid ◽  
Modified Electrode ◽  
Plant Material ◽  
Selective Determination

scholarly journals Selective Determination of Sudan IV in Food Using Sulfamic Acid-Modified Electrode

2013 ◽  
Vol 25 (14) ◽  
pp. 7769-7772
Author(s):  
Meifeng Chen ◽  
Xinying Ma ◽  
Zhaoxia Wang
Keyword(s):  
Modified Electrode ◽  
Sulfamic Acid ◽  
Selective Determination ◽  
Sudan Iv

scholarly journals Selective Determination of Dopamine in Presence of Ascorbic Acid Using Nafion Coated Methylene Blue Functionalized Graphite Electrode

2019 ◽  
Vol 31 (10) ◽  
pp. 2185-2190
Author(s):  
G. Sivasankari ◽  
K. Sivasankari ◽  
T. Nalini ◽  
P. Padmapriya ◽  
M. Nadhiya
Keyword(s):  
Methylene Blue ◽  
Ascorbic Acid ◽  
Modified Electrode ◽  
Electrode Surface ◽  
Graphite Electrode ◽  
Low Cost ◽  
Differential Pulse ◽  
Selective Determination ◽  
The Stability

An electrochemical sensor has been developed using methylene blue (MB) unctionalized graphite for the selective determination of dopamine in the presence of ascorbic acid. The immobilization of methylene blue on graphite was done by carbodiimide coupling method. The methylene blue functionalized graphite was characterized by SEM, FTIR spectroscopy and UV-visible spectroscopy. The immobilization of methylene blue functionalized graphite (MB-G) on the electrode surface was made by drop casting a small volume of MB-G dispersed methanol solution on the electrode surface. About 5 L of 0.5 % Nafion solution was also dropcasted for the stability and selectivity. The MB-G modified electrode was characterized by cyclic voltammetry. The modified electrode promotes the electrocatalytic oxidation of dopamine at a lower potential of 160 mV. The selective determination of dopamine in the presence of 100 times higher concentration of ascorbic acid was achieved by differential pulse voltammetry. The modified electrode offered a simple, selective and sensitive determination of low levels of dopamine. Also the oxidation over potential was reduced to an extent of 360 mV comparing with the bare graphite electrode. The proposed sensor has the advantage of easy fabrication, low cost, good sensitivity, reproducibility and stability.

Selective determination of dopamine in the presence of ascorbic acid at the carbon atom wire modified electrode

2005 ◽  
Vol 578 (2) ◽  
pp. 323-329 ◽  
Author(s):  
Kuan-Hong Xue ◽  
Fei-Fei Tao ◽  
Wen Xu ◽  
Shou-Yin Yin ◽  
Jia-Mei Liu
Keyword(s):  
Ascorbic Acid ◽  
Carbon Atom ◽  
Modified Electrode ◽  
Selective Determination

A novel nanoporous gold modified electrode for the selective determination of dopamine in the presence of ascorbic acid

2009 ◽  
Vol 69 (1) ◽  
pp. 105-108 ◽  
Author(s):  
Hua-Jun Qiu ◽  
Gui-Ping Zhou ◽  
Guang-Lei Ji ◽  
Yun Zhang ◽  
Xi-Rong Huang ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Modified Electrode ◽  
Nanoporous Gold ◽  
Selective Determination
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