Reduction mechanism of nickel(II) ammonia complexes on the dropping mercury electrode

1985 ◽  
Vol 30 (2) ◽  
pp. 261-264 ◽  
Author(s):  
J. Urbańska
Keyword(s):  
Mercury Electrode ◽  
Reduction Mechanism ◽  
Dropping Mercury Electrode

Reduction of the Ni(II) ion at the dropping mercury electrode from amoxicillin water solution

1991 ◽  
Vol 56 (1) ◽  
pp. 152-156 ◽  
Author(s):  
Milenko R. Erceg ◽  
Vera P. Kapetanović ◽  
Desanka Ž. Sužnjević
Keyword(s):  
Complex Formation ◽  
Double Layer ◽  
Rate Constant ◽  
Electrical Double Layer ◽  
Water Solution ◽  
Mercury Electrode ◽  
Reduction Mechanism ◽  
Dropping Mercury Electrode ◽  
Heterogenous Reaction

The nature of polarographic precurrents of Ni(II) ion in the presence of amoxicillin as well as the behaviour of amoxicillin in the electrical double layer has been investigated. It has been established the formation of the mono complex of Ni(II) ion with amoxicillin adsorbed at the mercury. The reduction mechanism of the complex has been proposed. Taking into account the effect of the double layer on the kinetics, the rate constant of the heterogenous reaction of the complex formation has been found to be 5.8 · 103 l mol-1 s -1.

Reduction and tensammetric pulse-polarographic currents of polynucleotides

1987 ◽  
Vol 52 (11) ◽  
pp. 2810-2818 ◽  
Author(s):  
Emil Paleček ◽  
František Jelen ◽  
Vladimír Vetterl
Keyword(s):  
Diagnostic Criteria ◽  
Pulse Width ◽  
Mercury Electrode ◽  
Pulse Amplitude ◽  
Single Strand ◽  
Pulse Polarography ◽  
Dropping Mercury Electrode ◽  
Adenylic Acid ◽  
Drop Time

The behaviour of electrochemically reducible single-strand polynucleotides (poly(adenylic acid)) and poly(cytidylic acid)) was studied by the differential (derivative) pulse polarography (DPP) and by other methods. Measurements were performed with the help of the dropping mercury electrode under various conditions specified by the pulse width, pulse amplitude, drop time etc. For the faradaic and tensammetric DPP peaks the diagnostic criteria were proposed which make it possible to classify even very small DPP peaks of double helical polynucleotides.

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