Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Adsorption Isotherms I

Adsorption Isotherms I

Adsorption isotherms are mathematical models that describe how molecules in a gas or liquid phase interact with surfaces. Two of the most common isotherm models are the Langmuir and Freundlich isotherms, which relate to Type I monolayer chemisorption. The Langmuir model is based on four key assumptions:• Adsorption cannot exceed monolayer coverage.• All surface sites are equivalent.• Molecules adsorb only at vacant sites.• There are no interactions between adsorbed...

Adsorption Isotherms II

Adsorption Isotherms II

Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...

Adsorption of Gases on Solids

Adsorption of Gases on Solids

Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Lévy Formulation of the Stochastic Theory of Chromatography and Extension to Phase-Type Markov Renewal Process.

Analytical chemistry·2026

Same author

Phase-Specific Parameter Estimation in Chiral HPLC Using 1-Site, 2-Site Stochastic Models, and Unified Equation Approach.

Analytical chemistry·2026

Same author

Price transparency of cancer medicines: a crucial step towards informed pricing negotiations in the European region.

Frontiers in pharmacology·2026

Same author

Application of design of experiments to optimize the separation of lipid-related compounds in supercritical fluid chromatography-mass spectrometry.

Journal of chromatography. A·2025

Same author

Automated R workflow for Batman peak fitting using unified equation and stochastic modeling.

Journal of chromatography. A·2025

Same author

Mathematical modeling of Taylor-Aris dispersion-assisted mass spectrometry for the study of operating conditions.

Talanta·2025

Search research articles

Related Experiment Video

Updated: May 5, 2026

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Published on: September 11, 2018

Multilayer adsorption on fractal surfaces.

Péter Vajda¹, Attila Felinger²

¹Department of Analytical and Environmental Chemistry and Szentágothai Research Center, University of Pécs, Ifjúság útja 6, H-7624 Pécs, Hungary.

Journal of Chromatography. A

|December 10, 2013

Summary

This summary is machine-generated.

This study introduces a fractal BET isotherm model for multilayer adsorption in liquid chromatography. The model successfully determined adsorbent surface fractal dimensions, offering new insights into adsorption behavior on chromatographic stationary phases.

More Related Videos

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

Published on: May 9, 2014

Au-Interaction of Slp1 Polymers and Monolayer from Lysinibacillus sphaericus JG-B53 - QCM-D, ICP-MS and AFM as Tools for Biomolecule-metal Studies

Au-Interaction of Slp1 Polymers and Monolayer from Lysinibacillus sphaericus JG-B53 - QCM-D, ICP-MS and AFM as Tools for Biomolecule-metal Studies

Published on: January 19, 2016

Related Experiment Videos

Last Updated: May 5, 2026

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Published on: September 11, 2018

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

Published on: May 9, 2014

Au-Interaction of Slp1 Polymers and Monolayer from Lysinibacillus sphaericus JG-B53 - QCM-D, ICP-MS and AFM as Tools for Biomolecule-metal Studies

Au-Interaction of Slp1 Polymers and Monolayer from Lysinibacillus sphaericus JG-B53 - QCM-D, ICP-MS and AFM as Tools for Biomolecule-metal Studies

Published on: January 19, 2016

Area of Science:

Physical Chemistry
Chromatography Science
Surface Science

Background:

Multilayer adsorption is common in liquid chromatography.
The Brunauer-Emmett-Teller (BET) isotherm equation is the standard model for multilayer adsorption.
Existing models may not fully capture the complex surface characteristics of chromatographic stationary phases.

Purpose of the Study:

To introduce and validate a fractal BET isotherm model for analyzing multilayer adsorption on liquid chromatographic stationary phases.
To determine the apparent fractal dimension of adsorbent surfaces using this new model.
To estimate adsorption equilibrium constants and monolayer saturation capacity.

Main Methods:

Application of a fractal BET isotherm model to multilayer adsorption data.
Nonlinear fitting of the fractal BET equation to experimental data.
Experimental analysis using aniline on reversed-phase columns and proline on normal-phase columns.

Main Results:

The fractal BET isotherm model was successfully applied to liquid chromatography stationary phases.
The model allowed for the determination of the apparent fractal dimension of the adsorbent surface.
Apparent fractal dimensions ranged from 2.88-2.99 for reversed-phase adsorbents, compared to 2.54 for bare silica.

Conclusions:

The fractal BET isotherm model provides a valuable interpretation of multilayer adsorption in liquid chromatography.
This approach enables the characterization of adsorbent surface complexity through fractal dimension.
The findings highlight differences in surface properties between bare silica and reversed-phase adsorbents.