A new chromatographic response function for assessing the separation quality in comprehensive two-dimensional liquid...

Area of Science:

• Analytical Chemistry
• Chromatography

Background:

• Comprehensive two-dimensional liquid chromatography (2D-LC) is crucial for analyzing complex organic mixtures.
• Existing methods for assessing separation quality in 2D-LC have limitations.

Purpose of the Study:

• To introduce and validate a novel chromatographic response function (CRF(2D)) for estimating separation quality in 2D-LC.
• To incorporate peak purity, peak capacity, and analysis time into a single objective function.

Main Methods:

• Developed an automated algorithm for 2D peak detection in experimental 2D-LC data.
• Applied a mathematical model for fitting chromatographic data and estimating peak overlap.
• Introduced a redefined peak purity concept for 2D-LC within the CRF(2D).

Main Results:

• The new CRF(2D) was compared against an existing resolution measure using simulated chromatograms.
• The CRF(2D) demonstrated capability in qualifying overall separation under varying chromatographic conditions.
• Validated through a 2D-LC analysis of aromatic compounds.

Conclusions:

• The proposed CRF(2D) offers a comprehensive approach to evaluating 2D-LC separation quality.
• This new function provides a more holistic assessment than traditional measures.
• The methodology advances the optimization of 2D-LC for complex mixture analysis.