Dependence of the adsorption of organic compounds at the dropping mercury electrode on the structure. VI. Comparison of adsorption activity of salicylanilide and 2-hydroxy-3-naphthanilide derivatives

1965 ◽  
Vol 30 (12) ◽  
pp. 4339-4342 ◽  
Author(s):  
G. Pályi ◽  
H. Jehring
Keyword(s):  
Organic Compounds ◽  
Mercury Electrode ◽  
Adsorption Activity ◽  
Dropping Mercury Electrode

Alternating current polarography of Organic compounds. IV. Perinaphthenone

1955 ◽  
Vol 8 (4) ◽  
pp. 480 ◽  
Author(s):  
B Breyer ◽  
HH Bauer
Keyword(s):  
Organic Compounds ◽  
Mercury Electrode ◽  
Alternating Current ◽  
Multilayer Adsorption ◽  
Adsorbed Film ◽  
Polarographic Wave ◽  
Dropping Mercury Electrode

The behaviour of perinaphthenone at the dropping mercury electrode has been investigated by the combined techniques of conventional (D.C.) and alternating current (A.C.) polarography. Two D.C. steps were observed, but an A.C. polarographic wave was found only at the potential of the more positive D.C. step. Two tensammetric waves were also seen, one of which appears to be the outcome of multilayer adsorption or of a change in state of the adsorbed film.

Alternating current polarography of organic compounds. V. Quantitative treatment of the adsorption process

1956 ◽  
Vol 9 (1) ◽  
pp. 1 ◽  
Author(s):  
B Breyer ◽  
HH Bauer
Keyword(s):  
Organic Compounds ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Mercury Electrode ◽  
Alternating Current ◽  
Qualitative Explanation ◽  
Calibration Curves ◽  
Adsorbent Surface ◽  
Dropping Mercury Electrode ◽  
Quantitative Treatment

Equations are derived to express the adsorption equilibrium subsisting at an adsorbent surface in the presence of two adsorbable species. These equations are applied to the case of the reduction of organic compounds at the dropping mercury electrode. It is well known that adsorption at the electrode can produce irreversibility in the D.C. step, and a qualitative explanation is provided. The same treatment is used to explain the shape of the A.C. calibration curves.

Alternating current polarography of organic compounds. III. Chloranilic acid

1955 ◽  
Vol 8 (4) ◽  
pp. 472 ◽  
Author(s):  
B Breyer ◽  
HH Bauer
Keyword(s):  
Organic Compounds ◽  
Mercury Electrode ◽  
Alternating Current ◽  
Multilayer Adsorption ◽  
Chloranilic Acid ◽  
Adsorbed Film ◽  
Dropping Mercury Electrode ◽  
New Type ◽  
Surface Active

The behaviour of chloranilic acid at the dropping mercury electrode has been techniques of ordinary and of alternating current polarography. A new type of tensammetric wave has been encountered, which is probably an outcome either of multilayer adsorption and/or of a change in state of the adsorbed film. At the same time, a new tensammetric phenomenon, the exchange of one species of surface-active molecules against another, has been observed. Alternating current polarography can be used for estimating chloranilic acid at concentrations as low as 10-7M, whereas conventional polarography does not permit analysis at concentrations below 10-5M.

Adsorption of Triphenyl Phosphine Oxide at the Dropping Mercury Electrode in Methanolic Solutions

1972 ◽  
Vol 27 (6) ◽  
pp. 634-636 ◽  
Author(s):  
S. L. Gupta ◽  
L. Holleck
Keyword(s):  
Phosphine Oxide ◽  
Mercury Electrode ◽  
Potential Range ◽  
Desorption Peak ◽  
Triphenyl Phosphine ◽  
Strong Inhibitor ◽  
Adsorption Activity ◽  
Electrode Processes ◽  
Dropping Mercury Electrode ◽  
Triphenyl Phosphine Oxide

Triphenyl Phosphine Oxide (TPO) which is known as a strong inhibitor of electrode processes in aqueous solutions is progressively adsorbed at the dme from methanol in the potential range -0.5 to -1.3 volts as compared with water, -0.15 to -1.6 volts (Ag/AgCl), for the concentrations studied. Adsorption activity as well as the sharpness of the desorption peak of TPO decrease in the order: water > 50% methanol > methanol and the adsorption region contracts as the solvent is changed from water to methanol. Adsorption isotherms in methanol and 50% methanol follow Langmuir's equation with adsorption coefficients equal to 1.58 x 102 l/mole and 1.62 x 104 l/mole respectively.

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