Trapping multiple dual mode centrifugal partition chromatography for the separation of intermediately-eluting...

Area of Science:

• Chromatographic separation techniques
• Chemical engineering
• Analytical chemistry

Background:

• Preparative separation of intermediately-eluting components in liquid-liquid chromatography often uses isocratic batch injections.
• This traditional method frequently results in low yield and purity due to peak overlap.

Purpose of the Study:

• To present an alternative discontinuous method for separating mixtures into three distinct fractions (early-, intermediately-, and late-eluting components).
• To achieve full recovery of all separated components.
• To develop a mathematical shortcut for determining key operating parameters.

Main Methods:

• Two-column trapping multiple dual mode centrifugal partition chromatography was employed.
• A mathematical shortcut method, based on equilibrium theory, was derived to determine step durations and the number of steps.
• Proof-of-concept experiments were conducted using paraben model mixtures.

Main Results:

• The developed two-column trapping method demonstrated feasibility for separating mixtures into three fractions.
• The mathematical shortcut method proved effective for determining operating parameters.
• Full recovery of separated components was achieved in proof-of-concept experiments.

Conclusions:

• The two-column trapping centrifugal partition chromatography offers an improved approach for preparative separations compared to traditional methods.
• The derived mathematical shortcut method simplifies the optimization of operating parameters for this technique.
• This method holds promise for efficient separation of complex mixtures in various chemical and pharmaceutical applications.