Centrifugal-Driven Microfluidic Chromatography for Low-Volume Purification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current chromatography technologies require large sample volumes and involve tedious experimental processes, making it difficult to integrate with miniaturized microfluidic platforms for efficient sample preparation and analysis.
Innovation Solution
A centrifugal-driven microfluidic platform incorporating a microfluidic module with features like injection chambers, separation columns, dispensing channels, and collection chambers, utilizing centrifugal force for fluid manipulation, and integrated with a driving module for automated operation and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional chromatography is used for separation and purification, then separation effectiveness is maintained, but sample volume requirement increases to at least one milliliter
Solution Approach 1:
The chromatography system is segmented into micro-scale components including microfluidic channels, miniaturized separation columns, and discrete collection chambers. This segmentation enables the system to achieve effective separation with significantly reduced sample volumes (microliter scale) while maintaining separation effectiveness through optimized microfluidic flow dynamics and increased surface-to-volume ratio in the separation medium.
Solution Approach 2:
The invention transitions from traditional bulk chromatography to microfluidic chromatography by changing the dimensional scale of the system. The microfluidic channels and separation columns operate in a reduced dimensional space, creating enhanced mass transfer efficiency and improved separation performance per unit volume, thereby reducing the total sample volume required while maintaining separation effectiveness.
2Manufacturing precision
If traditional chromatography is used for separation and purification, then separation effectiveness is maintained, but experimental process complexity increases
Solution Approach 1:
Multiple chromatography operations (sample injection, separation, fraction collection, and waste disposal) are merged into a single integrated microfluidic device. The microfluidic chip combines the separation column, multiple collection chambers, and waste chamber into one compact unit, eliminating the need for separate equipment and manual transfer operations, thereby reducing experimental process complexity while maintaining separation effectiveness.
Solution Approach 2:
The microfluidic device is designed with multi-functionality, where a single device can perform sample injection, separation, fractionation into multiple chambers, and waste collection. The device can also be configured for different separation modes (normal phase, reverse phase, ion exchange) using the same basic platform, reducing the need for multiple specialized equipment and simplifying the experimental workflow.
3Volume of moving object
If microfluidic technology is applied to biochemical detection, then device size is reduced to microliter volume, but automation capability is limited
Solution Approach 1:
The microfluidic device incorporates self-service features where the system automatically performs sample distribution to multiple collection chambers based on separation elution patterns. The device includes integrated valves and pumps that autonomously control fluid flow, fraction collection timing, and waste disposal without requiring manual intervention, thereby enhancing automation capability within the compact microliter-scale device.
Solution Approach 2:
The microfluidic system incorporates feedback mechanisms through integrated detection elements that monitor the separation process in real-time. Based on detection signals (such as UV absorption or conductivity changes), the system automatically adjusts fraction collection timing and switching between collection chambers and waste, enabling automated operation with reduced device size and minimal external control.
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
Reduces sample volume requirements, automates the process, minimizes reagent use, and significantly decreases experimental time while maintaining high efficiency in sample purification and analysis.
Implementation Method 1
a centrifugal-driven microfluidic platform, which mainly uses a centrifugal force to drive the fluid to flow to the outer radius when the motor rotates
Implementation Method 2
Chromatography has so far been the most common method separating the mixture by the affinity of stationary phase and the mobile phase
Data Source
AI summary
In this invention, chromatography is integrated on a centrifugal platform to enable low-cost automated purification. Differing from the traditional chromatography method, purification and separation of a centrifugal compound collecting platform disclosed in the present invention mainly uses a centrifugal force to drive the fluid to flow outward in the radial direction when the motor rotates. The compounds to be separated react with the column packing during the flow, and the compounds with different polarities in the sample are gradually separated. The flow of the fluid can be governed by the motor and the geometry of the fluidic design such that compounds with different characteristics can be separated and collected in different collecting chambers.