Electrochemical Reduction of 2,6-Dithiopurine at the Dropping Mercury Electrode and the Pyrolytic Graphite Electrode

1970 ◽  
Vol 117 (9) ◽  
pp. 1118 ◽  
Author(s):  
Glenn Dryhurst
Keyword(s):  
Electrochemical Reduction ◽  
Graphite Electrode ◽  
Pyrolytic Graphite ◽  
Mercury Electrode ◽  
Dropping Mercury Electrode ◽  
Pyrolytic Graphite Electrode

Polarography of nickel in concentrated chloride media

1966 ◽  
Vol 19 (8) ◽  
pp. 1343 ◽  
Author(s):  
TM Florence
Keyword(s):  
Ionic Strength ◽  
Graphite Electrode ◽  
Supporting Electrolyte ◽  
Anhydrous Methanol ◽  
Pyrolytic Graphite ◽  
Hydration Number ◽  
Mercury Electrode ◽  
Specific Adsorption ◽  
Dropping Mercury Electrode ◽  
Pyrolytic Graphite Electrode

In concentrated chloride media, nickel is reduced at far more positive potentials than in dilute solutions. The positive shift in half-wave potential increases as the ionic strength is raised, and is also greater when the cation of the supporting electrolyte has a high hydration number. Evidence is presented to show that the reduction in overpotential is due to the formation of a nickel chloride complex, [Ni(H2O)5Cl]+, which has a stoicheiometric stability constant of 0.094 � 0.009 at an ionic strength of 10.0. Spectrophotometric results show that this nickel species is not formed in low ionic strength solutions. In anhydrous methanol saturated with lithium chloride, nickel is present as the tetrachloro complex, [NiCl,]2-, which has similar polarographic behaviour to the monochloro complex. Current-potential curves recorded at a rotated pyrolytic graphite electrode enabled the behaviour of nickel to be studied in the absence of specific adsorption of the chloride ion. Nickel is reduced at more positive potentials at a dropping mercury electrode than at the pyrolytic graphite electrode, and the results indicate that this difference is due to specific adsorption of chloride on the mercury electrode.

scholarly journals Electroanalytical Determination of Cadmium(II) and Lead(II) Using an in-situ Bismuth Film Modified Edge Plane Pyrolytic Graphite Electrode

2007 ◽  
Vol 23 (3) ◽  
pp. 283-289 ◽  
Author(s):  
Roohollah Torabi KACHOOSANGI ◽  
Craig E. BANKS ◽  
Xiaobo JI ◽  
Richard G. COMPTON
Keyword(s):  
Graphite Electrode ◽  
Pyrolytic Graphite ◽  
Bismuth Film ◽  
Pyrolytic Graphite Electrode

Electrochemical investigations of 8-hydroxydeoxyguanosine and its determination at an edge plane pyrolytic graphite electrode

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 1722-1728 ◽  
Author(s):  
Pankaj Gupta ◽  
Munetaka Oyama ◽  
Rajendra N. Goyal
Keyword(s):  
Detection Limit ◽  
Electrochemical Oxidation ◽  
Graphite Electrode ◽  
Pyrolytic Graphite ◽  
Low Detection Limit ◽  
Pyrolytic Graphite Electrode

Electrochemical oxidation of 8-hydroxydeoxyguanosine (8-OHdG) and its detection with low detection limit is reported at pyrolytic graphite electrode.

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