Mass transfer coefficients determination from linear gradient elution experiments.

Area of Science:

• Analytical Chemistry
• Chromatography Science

Background:

• Traditional methods for estimating mass transfer coefficients rely on isocratic elution, which is unsuitable for large biomolecules.
• Large biomolecules often exhibit significant mass transfer hindrances, complicating accurate analysis.

Purpose of the Study:

• To present a validated procedure for estimating mass transfer coefficients in linear gradient elution chromatography.
• To offer a method that overcomes the limitations of isocratic elution for analyzing large biomolecules.

Main Methods:

• Developed a procedure based on Yamamoto et al.'s work for linear gradient elution chromatography.
• Derived a rigorous analytical expression for the Height Equivalent to a Theoretical Plate (HETP) in linear gradient elution.

Main Results:

• The proposed procedure was validated against experimental data.
• The method provides reliable mass transfer parameters from linear gradient elution experiments.
• An analytical expression for HETP under linear gradient elution was derived.

Conclusions:

• The new procedure enables accurate estimation of mass transfer coefficients for large biomolecules.
• Linear gradient elution chromatography offers a viable alternative to isocratic conditions for challenging samples.
• This work advances chromatographic analysis by providing a robust method for parameter estimation.