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Improved method for using the koryta adsorption equation: Adsorption of erythrosin

✍ Scribed by P.W. Board; D. Britz; R.V. Holland


Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
472 KB
Volume
13
Category
Article
ISSN
0013-4686

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✦ Synopsis


Ah&raet-A method is proposed for the estimation of maximum surface concentrations of adsorbates by ac impedance mtasurements at low electrode coverages. This gives better results than methods based on measurement of the time for full electrode coverage. The dyestuff erythrosin is examined and found to have a maximum surface concentration on mercury of I.43 x lb-lo mole/cm*, or an area requirement of 117 A*/molecule. this allows some conclusions about the orientation of the molecule on the mercury surface.

R&m&-Proposition d'une m6thode d'estimation des concentrations superhcielles maximales des adsorbats par mesure de l'impedance du courant anodique a faibles nxouvrements d%lectrode. Elle donne de meilleurs &ultats que les m6thodes ba&es sur la mesure du temps de recouvrement total de l'&ctrode. La laque 6rythrosine util%e, d&rote une concentration superhcielle ma7dmum sur mercure de 1,43 x 1O-1o mole/cm*, soit une surface requise de 117 A* par mol6cule. &ci permet quelques conclusions sur l'orientation de la molecule a la surface du mercure.


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