Simultaneous determination of theobromine, theophylline, and caffeine using a modified electrode with petal-like MnO2 nanostructure

Talanta ◽  
2021 ◽  
Vol 222 ◽  
pp. 121563 ◽  
Author(s):  
Nasrin Arefi Nia ◽  
Mohammad Mehdi Foroughi ◽  
Shohreh Jahani
Keyword(s):  
Simultaneous Determination ◽  
Modified Electrode ◽  
Mno2 Nanostructure

scholarly journals Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Gen Liu ◽  
Wei Ma ◽  
Yan Luo ◽  
Deng-ming Sun ◽  
Shuang Shao
Keyword(s):  
Methylene Blue ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

Simultaneous determination of captopril, acetaminophen and tryptophan at a modified electrode based on carbon nanotubes

2012 ◽  
Vol 686 ◽  
pp. 12-18 ◽  
Author(s):  
Mohammad Mazloum-Ardakani ◽  
Mohammad Ali Sheikh-Mohseni ◽  
Bibi-Fatemeh Mirjalili ◽  
Leila Zamani
Keyword(s):  
Carbon Nanotubes ◽  
Simultaneous Determination ◽  
Modified Electrode

Simultaneous determination of ascorbic acid, dopamine and uric acid using poly(l-leucine)/DNA composite film modified electrode

2015 ◽  
Vol 213 ◽  
pp. 188-194 ◽  
Author(s):  
Xinyu Zheng ◽  
Yuheng Guo ◽  
Jinshuai Zheng ◽  
Xuechou Zhou ◽  
Qinglu Li ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Modified Electrode

Simultaneous determination of TBHQ and BHA on a MWNT-Brij® 35 modified electrode in micellar media

2015 ◽  
Vol 7 (19) ◽  
pp. 8344-8351 ◽  
Author(s):  
Guzel Ziyatdinova ◽  
Karina Os'kina ◽  
Endzhe Ziganshina ◽  
Herman Budnikov
Keyword(s):  
Simultaneous Determination ◽  
Glassy Carbon Electrode ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Micellar Medium ◽  
Micellar Media ◽  
Modified Glassy Carbon Electrode ◽  
Simultaneous Voltammetric Determination

Simultaneous voltammetric determination of TBHQ and BHA using a MWNT-Brij® 35 modified glassy carbon electrode in Brij® 35 micellar medium.

scholarly journals A Voltammetric Sensor Based on MgFe2 O4 Decorated on Reduced Graphene Oxide-modified Electrode for Sensitive and Simultaneous Determination of Catechol and Hydroquinone

2018 ◽  
Vol 30 (11) ◽  
pp. 2620-2627 ◽  
Author(s):  
Miloš Ognjanović ◽  
Dalibor M. Stanković ◽  
Martin Fabián ◽  
Aleksandar Vukadinović ◽  
Željko Prijović ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Voltammetric Sensor ◽  
Reduced Graphene
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