Chip-based high-performance liquid chromatography for high-speed enantioseparations

Area of Science:

• Analytical Chemistry
• Separation Science
• Microfluidics

Background:

• Chiral separations are crucial for pharmaceuticals.
• Microfluidic devices offer advantages in speed and efficiency.
• Developing high-performance chiral chromatography in microchips is an ongoing challenge.

Purpose of the Study:

• To present the first high-performance chiral liquid chromatography system integrated into packed microfluidic chips.
• To demonstrate the versatility and efficiency of this novel microchip platform for enantiomeric separations.

Main Methods:

• Utilized a microfluidic glass chip with an integrated column packed with a chiral stationary phase (Cellulose tris(3,5-dimethylphenylcarbamate) on silica).
• Performed chromatographic separations under reversed-phase, polar organic, and normal-phase conditions.
• Analyzed separation efficiency using Van Deemter plots and assessed mass transfer processes.

Main Results:

• Achieved baseline separation of racemic analytes, including pharmaceuticals, into their enantiomers.
• Demonstrated reduced plate height of 2.2 and enhanced mass transfer under low retention conditions.
• Obtained ultrafast enantiomer separations within 5 seconds using short columns (down to 12 mm).

Conclusions:

• The developed microfluidic chip platform enables high-performance chiral separations with exceptional speed.
• The system shows versatility across different chromatographic conditions, suitable for pharmaceutical analysis.
• This technology holds promise for rapid and efficient enantiomer analysis in various applications.