Ion Mobility Separator for Enantiomer Resolution
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Solution Overview
Problem
Current methods for separating enantiomers, such as chromatography, are time-consuming and inefficient, especially for high-throughput screening and early stages of drug development, due to similar retention times and lengthy method development processes.
Innovation Solution
The use of ion mobility separation in the gas phase, employing an ionization source and an ion mobility separator with a chiral modifier to selectively interact with enantiomers, allowing for rapid separation and collection of chiral molecules using an ion collector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chromatography is used for enantiomer separation, then separation can be achieved, but analysis time becomes very long (20-30 minutes per sample)
Solution Approach 1:
The patent transitions the separation process from liquid phase (chromatography) to gas phase (ion mobility spectrometry). By ionizing the analyte and performing separation in the gas phase, the method achieves much faster separation times (milliseconds to seconds) while maintaining separation quality, directly resolving the time-consuming nature of liquid chromatography
Solution Approach 2:
The patent replaces the mechanical chromatographic separation mechanism (physical movement through a column) with an electrical field-based ion mobility separation mechanism. Ions are separated based on their mobility in an electric field rather than relying on retention times in a chromatographic column, enabling rapid high-throughput screening
2Measurement precision
If chromatography is used for enantiomer separation, then separation can be achieved, but method development becomes lengthy and complex
Solution Approach 1:
The patent changes the fundamental separation parameter from liquid-phase retention time to gas-phase ion mobility. This parameter change simplifies method development because ion mobility separation relies on intrinsic properties of ionized molecules (mass, charge, shape) rather than requiring optimization of complex chromatographic conditions such as mobile phase composition, flow rate, and column temperature
Solution Approach 2:
The patent extracts the separation function from the complex chromatographic system and implements it independently in the gas phase using ion mobility spectrometry. This extraction eliminates the need for lengthy method development associated with chromatography while maintaining separation capability
3Measurement precision
If enantiomers are separated by chromatography, then separation can be achieved, but poor separation per pass occurs when retention times are very similar
Solution Approach 1:
The patent moves the separation process to another dimension by transitioning from liquid-phase to gas-phase separation. In the gas phase, ionized enantiomers exhibit different mobility characteristics that provide enhanced separation resolution, allowing better distinction between enantiomers with similar retention times in a single pass
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables rapid separation and collection of enantiomers in milliseconds to tens of seconds, improving throughput and reducing analysis time, making it suitable for high-throughput screening and early drug development stages.
Implementation Method 1
an ionization source; an ion mobility separator
Implementation Method 2
ion mobility separation in the gas phase, employing an ionization source and an ion mobility separator with a chiral modifier to selectively interact with enantiomers
Data Source
AI summary
This invention describes an apparatus and method with a combined primary electrospray and secondary electrospray ionization source used to enhance ionization efficiency. The solid phase as well as liquid phase sampling, ionization, and detection is described.