Chromatographic adhesion law to simplify surface energy calculation.

Area of Science:

• Physical Chemistry
• Surface Science
• Chromatography

Background:

• Inverse gas chromatography (IGC) data variability arises from diverse calculation methods and n-alkane series.
• Accurate determination of solid surface properties is crucial for material science applications.

Purpose of the Study:

• To establish a unified chromatographic adhesion law for consistent IGC data analysis.
• To develop a novel method for calculating solid surface dispersive, electron acceptor, and electron donor components.
• To derive an accurate equation for dead retention time calculation.

Main Methods:

• Combined Van Oss–Good–Chaudhury concept, Dorris–Gray, Schultz, and Fowkes equations with group contribution theory.
• Developed the chromatographic adhesion law: K(a)(i) = e(ΔEai /kT).
• Correlated retention time with adhesion energy for infinite dilution region analysis.

Main Results:

• Successfully established the chromatographic adhesion law, defining K(ai), ΔE(ai), and kT.
• Enabled calculation of solid surface dispersive (γ(dS)), electron acceptor (γ(+S)), and electron donor (γ(−S)) components.
• Derived a new equation for calculating dead retention time.

Conclusions:

• The chromatographic adhesion law provides a standardized approach to IGC data interpretation.
• The method accurately quantifies solid surface characteristics, enhancing material characterization.
• Improved dead retention time calculation increases the reliability of IGC measurements.