Nanoliter Scale Parallel Liquid-Liquid Extraction for High-Throughput Purification on a Droplet Microarray.

Area of Science:

• Chemical Engineering
• Biotechnology
• Analytical Chemistry

Background:

• Drug discovery involves separating compound synthesis from biological screening.
• High-throughput purification of synthesized compounds on-chip remains a significant challenge.
• Current methods lack the miniaturization and parallel processing needed for accelerated discovery.

Purpose of the Study:

• To demonstrate an on-chip miniaturized high-throughput liquid-liquid extraction method.
• To enable parallel purification of synthesized compounds for drug discovery.
• To integrate chemical synthesis and biological screening on a single platform.

Main Methods:

• Automated and programmable merging of aqueous and organic nanoliter droplets.
• Multi-step liquid-liquid extraction performed simultaneously or with changing conditions.
• On-chip analysis using fast optical readout and MALDI-MS detection.

Main Results:

• Demonstrated on-chip liquid-liquid extraction in volumes down to 150 nL.
• Achieved extraction efficiency comparable to or exceeding large-scale methods.
• Successfully handled femtomole quantities of compounds with high throughput.
• Validated the chemBIOS concept for integrated synthesis and screening.

Conclusions:

• The developed massively parallel and miniaturized purification method is crucial for accelerating drug discovery.
• This technique enhances the chemBIOS platform by enabling on-chip purification.
• It overcomes a major technological hurdle in high-throughput drug discovery pipelines.