A kinetic study of ferrocenium cation decomposition utilizing an integrated electrochemical methodology composed of cyclic voltammetry and amperometry

The Analyst ◽  
2014 ◽  
Vol 139 (22) ◽  
pp. 5747-5754 ◽  
Author(s):  
Archana Singh ◽  
Debarati Roy Chowdhury ◽  
Amit Paul
Keyword(s):  
Cyclic Voltammetry ◽  
Kinetic Study ◽  
Ferrocenium Cation

Electro-initiated polymerization of bis-(2,4,6-tribromophenoxo) ethylenediamine copper(II) complex in DMF and its kinetic study by cyclic voltammetry

1990 ◽  
Vol 26 (3) ◽  
pp. 255-259 ◽  
Author(s):  
Levent Toppare ◽  
Lemi Tüker ◽  
Semih Yiǧit ◽  
Duygu Kisakürek ◽  
Ural Akbulut
Keyword(s):  
Cyclic Voltammetry ◽  
Kinetic Study

Kinetic study and characterization of a platinum electrode/sensitive membrane for malachite green detection

Sensor Review ◽  
2018 ◽  
Vol 38 (3) ◽  
pp. 335-344 ◽  
Author(s):  
Ilhem Ghodbane ◽  
Rochdi Kherrrat ◽  
Saida Zougar ◽  
Rim Lamari ◽  
Redouane Haddadji ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Detection Limit ◽  
Kinetic Study ◽  
Linear Relationship ◽  
Correlation Coefficient ◽  
Malachite Green ◽  
Platinum Electrode ◽  
Electrochemical Impedance ◽  
Polymeric Membrane ◽  
Content Type

PurposeThe purpose of this work is to explore electrical properties of an electrochemical sensor designed for the detection of malachite green (MG) present in an aqueous solution.Design/methodology/approachThe present sensor consists in the spatial coupling of a polymeric membrane and an ion-sensitive electrode (platinum electrode). The preparation of the polymeric membrane involves the incorporation of an ionophore (D2HPA), a polymer (polyvinylchloride [PVC]) and a plasticizer (dioctyl phthalate [DOP]). Several techniques have been used to characterize this sensor: the cyclic voltammetry, the electrochemical impedance spectroscopy and the optical microscopy. The sensibility, the selectivity and the kinetic study of a modified platinum electrode have been evaluated by cyclic voltammetry.FindingsThe obtained results reveal the possibility of a linear relationship between the current of reduction peaks and MG concentration. A linear response was obtained in a wide-concentration range that stretches from 10−5to 10−13mol L−1, with a good correlation coefficient (0.976) and a good detection limit of 5.74 × 10−14mol L−1(a signal-to-noise ratio of 3). In addition, the voltammetric response of modified electrode can be enhanced by adding a layer of Nafion membrane. Under this optimal condition, a linear relationship was obtained, with a correlation coefficient of 0.986 and a detection limit of 1.92 × 10−18mol L−1.Originality/valueIn the present research, a convenient, inexpensive and reproducible method for the detection of MG was developed. The developed sensor is capable of competing against the conventional techniques in terms of speed, stability and economy.

A kinetic study of controlling nitrogen in process for boron steel by using30N2isotope gas

2008 ◽  
Vol 105 (12) ◽  
pp. 601-608
Author(s):  
Seung Min Han ◽  
Dong Joon Min ◽  
Joo Hyun Park ◽  
Jung Ho Park ◽  
Jong Min Park
Keyword(s):  
Kinetic Study ◽  
Boron Steel

Kinetic Study of the Effect of Heparin on the Amidase Activity of Trypsin, Plasmin and Urokinase

1983 ◽  
Vol 49 (03) ◽  
pp. 199-203 ◽  
Author(s):  
V M Yomtova ◽  
N A Stambolieva ◽  
B M Blagoev
Keyword(s):  
Kinetic Study ◽  
Active Center ◽  
Simultaneous Presence ◽  
Amidase Activity ◽  
Competitive Inhibitors ◽  
Uncompetitive Inhibitor

SummaryIt was found that the effect of heparin on the amidase activity of urokinase (E C 3.4.21.31), plasmin (E C 3.4.21.7) and trypsin (E C 3.4.21.4) depended on the substrate used. No effect of heparin on the amidase activity of urokinase and trypsin was observed when Pyro Glu-Gly-Arg-p-nitroanilide (S-2444) and α-N-acetyl-L-lysine-p-nitroanilide (ALNA) were used as substrates. Heparin acted as a uncompetitive inhibitor of trypsin (Ki = 1.2×10-6 M), plasmin (Ki = 4.9×10-6 M) and urokinase (Ki = l.0×10-7 M) when Bz-Phe-Val-Arg-p-nitroanilide (S-2160), H-D-Val-Leu-Lys-p-nitroanilide (S-2251) and plasminogen, respectively, were used as substrates. These results, as well as the data obtained by studying the effect of the simultaneous presence of heparin and competitive inhibitors suggest that although heparin is not bound at the active center of these enzymes, it may influence the effectivity of catalysis.

A kinetic study of the metathesis of propene on a rhenium-aluminium catalyst

1981 ◽  
Vol 31 (1) ◽  
pp. 388-394 ◽  
Author(s):  
Mahmoud El-Sawi ◽  
Antonio Iannibello ◽  
Fernando Morelli ◽  
Ganfranco Gatalano ◽  
Francesco Intrieri ◽  
...  
Keyword(s):  
Kinetic Study
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