Cavity Ring Magnet for Magnetic Bead Separation and Pipetting
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Solution Overview
Problem
Existing magnetic bead technologies face challenges in efficiently isolating and purifying macromolecules, particularly at higher reaction volumes, due to the need for stronger magnets, easier manual pipetting, and accommodating various sample containers, leading to inefficiencies in throughput and concentration.
Innovation Solution
A magnet with a solid core and cavities that form a pattern for magnetic bead complexes, allowing for efficient separation and purification of macromolecules by forming a ring pattern within the vessel, facilitating easier manual pipetting and accommodating different sample volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If stronger magnets are used to improve separation efficiency at higher reaction volumes, then productivity increases, but device complexity increases
Solution Approach 1:
The magnet is divided into multiple segments arranged in an alternating polarity pattern (north-south-north-south), creating multiple localized magnetic fields that work together to capture magnetic beads across the entire sample volume. This segmentation allows the magnet to effectively process larger volumes without requiring excessive magnetic strength from a single source.
Solution Approach 2:
The magnet segments are positioned asymmetrically within the well structure, with specific placement patterns that optimize the distribution of magnetic forces across the sample. This asymmetric arrangement enhances separation efficiency by creating favorable magnetic gradients that capture beads throughout the reaction volume without requiring uniformly high magnetic strength throughout.
2Quantity of substance
If smaller elution buffer volumes are used to increase product concentration, then concentration increases, but ease of operation decreases due to challenging manual pipetting
Solution Approach 1:
The alternating polarity magnet segments create distinct magnetic capture zones that naturally concentrate beads in specific regions of the well. This segmentation allows for smaller, more manageable elution volumes to be applied directly to the concentrated bead regions, maintaining high product concentration while creating defined areas that are easier to pipette from manually.
Solution Approach 2:
The magnetic field strength and bead distribution are optimized locally at each magnet segment position, creating zones of high bead concentration that can be efficiently eluted with small buffer volumes. This local optimization allows manual pipetting to focus on specific concentrated regions rather than distributing effort across the entire well.
3Productivity
If a solid core magnet design is used to enhance magnetic field strength, then separation efficiency improves, but adaptability to various sample containers decreases
Solution Approach 1:
The magnet segments are designed with a standardized configuration that can function effectively across multiple container types including deep well plates, PCR plates, and other common laboratory vessels. The alternating polarity pattern and segment geometry are optimized to work with various well shapes and sizes, making the same magnet design universally applicable to different sample containers while maintaining high separation efficiency.
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
The magnet design enhances macromolecule recovery yields, concentration, and purity, reducing the risk of bead loss during pipetting and accommodating various sample sizes and containers.
Implementation Method 1
The magnet, in particular, can be used to isolate macromolecules by making them adhere to magnetic beads, after which they can be separated from the mixture. The magnet is then used to attract the complexes and pull them out of solution.
Data Source
AI summary
A solid-core ring-magnet having one or more cavities is provided. The magnet can have an overall cylindrical shape or a rectangular-prism shape. In either case, a portion of cavity walls of the magnet are ring shaped, causing the magnetic field lines to emanate from the magnet so that the bead formation is in the shape of a ring. A bead separation magnet having a discontinuous or segmented cavity wall is also provided. The segmented cavity wall causes bead formation to form in a segmented or gapped ring to allow for easier manual pipetting. Also provided are systems and kits having the inventive magnets. Methods of purifying a macromolecule using the inventive magnets are also provided.