Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

Sherril D. Christian; Glenn Dryhurst; Viktor Brabec; James G. Baker

doi:10.1016/0021-9797(77)90096-0

Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

Sherril D. Christian, Glenn Dryhurst, Viktor Brabec, James G. Baker

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A method has been developed to obtain adsorption isotherms by analyzing spreading pressure-surface charge data obtained throughout a range of potentials. The Gibbs adsorption equation is used to infer solute activities of uracil and of caffeine in aqueous electrolyte solutions. Activities of uracil vary nearly in direct proportion with concentrations; activities for caffeine deviate considerably from linearity with concentration in the 10 to 50 mM range. Activity data are compared with literature results and with activities obtained in this laboratory from partition experiments.

Original language	English (US)
Pages (from-to)	454-460
Number of pages	7
Journal	Journal of Colloid And Interface Science
Volume	62
Issue number	3
DOIs	https://doi.org/10.1016/0021-9797(77)90096-0
State	Published - Dec 1977
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/0021-9797(77)90096-0

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title = "Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data",

abstract = "A method has been developed to obtain adsorption isotherms by analyzing spreading pressure-surface charge data obtained throughout a range of potentials. The Gibbs adsorption equation is used to infer solute activities of uracil and of caffeine in aqueous electrolyte solutions. Activities of uracil vary nearly in direct proportion with concentrations; activities for caffeine deviate considerably from linearity with concentration in the 10 to 50 mM range. Activity data are compared with literature results and with activities obtained in this laboratory from partition experiments.",

author = "Christian, {Sherril D.} and Glenn Dryhurst and Viktor Brabec and Baker, {James G.}",

note = "Funding Information: support of this work through National Institutes of Health Grant No. GM 21034 and National Science Foundation Grant GP-43307.",

year = "1977",

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doi = "10.1016/0021-9797(77)90096-0",

language = "English (US)",

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journal = "Journal of Colloid And Interface Science",

issn = "0021-9797",

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T1 - Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

AU - Christian, Sherril D.

AU - Dryhurst, Glenn

AU - Brabec, Viktor

AU - Baker, James G.

N1 - Funding Information: support of this work through National Institutes of Health Grant No. GM 21034 and National Science Foundation Grant GP-43307.

PY - 1977/12

Y1 - 1977/12

N2 - A method has been developed to obtain adsorption isotherms by analyzing spreading pressure-surface charge data obtained throughout a range of potentials. The Gibbs adsorption equation is used to infer solute activities of uracil and of caffeine in aqueous electrolyte solutions. Activities of uracil vary nearly in direct proportion with concentrations; activities for caffeine deviate considerably from linearity with concentration in the 10 to 50 mM range. Activity data are compared with literature results and with activities obtained in this laboratory from partition experiments.

AB - A method has been developed to obtain adsorption isotherms by analyzing spreading pressure-surface charge data obtained throughout a range of potentials. The Gibbs adsorption equation is used to infer solute activities of uracil and of caffeine in aqueous electrolyte solutions. Activities of uracil vary nearly in direct proportion with concentrations; activities for caffeine deviate considerably from linearity with concentration in the 10 to 50 mM range. Activity data are compared with literature results and with activities obtained in this laboratory from partition experiments.

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U2 - 10.1016/0021-9797(77)90096-0

DO - 10.1016/0021-9797(77)90096-0

M3 - Article

AN - SCOPUS:49449129061

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VL - 62

SP - 454

EP - 460

JO - Journal of Colloid And Interface Science

JF - Journal of Colloid And Interface Science

IS - 3

ER -

Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

Abstract

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