Magnetic Rack for Nucleic Acid Extraction
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Solution Overview
Problem
Existing methods for nucleic acid extraction and purification using magnetic beads require multiple steps such as bead collection, bead release, and bead transfer, which are often not synchronized and are not easily adaptable to different beads, leading to inefficiencies in sample handling and reproducibility.
Innovation Solution
A magnetic rack with longitudinal and lateral movement structures that allows for precise control of magnetic forces to attract and release magnetic beads within reaction tubes, enabling simultaneous sample addition and bead adsorption, and automatic synchronization of reactions across multiple tubes, thereby improving efficiency and reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic beads are used for nucleic acid extraction, then extraction efficiency is improved, but multiple separate steps (bead collection, bead release, bead transfer) are required which reduces productivity
Solution Approach 1:
The patent combines multiple separate operations (bead collection, bead release, and bead transfer) into a single integrated magnetic rack system. The magnetic rack can simultaneously perform bead collection at one location and bead release at another location, eliminating the need for sequential manual transfers and improving overall productivity while maintaining extraction efficiency.
Solution Approach 2:
The magnetic rack is designed with multi-functionality to perform various operations including bead collection, bead release, and bead transfer within a single device. The system can accommodate different bead types and perform multiple functions simultaneously, reducing the number of separate steps required and improving sample handling efficiency.
2Device complexity
If manual bead transfer steps are used, then device complexity is reduced, but reproducibility and precision of sample processing deteriorate
Solution Approach 1:
The magnetic rack system incorporates controlled movement mechanisms that can precisely position magnets at specific locations and times. The system uses coordinated control to manage bead collection, release, and transfer operations, ensuring reproducible results across multiple samples while maintaining manageable device complexity through automated positioning.
Solution Approach 2:
The magnetic rack employs dynamic magnet movement capabilities, where magnets can be automatically positioned to different locations (e.g., above reaction tubes for collection, above collection tubes for release) as needed. This dynamic positioning system enables precise and reproducible bead manipulation without requiring overly complex fixed infrastructure.
3Ease of operation
If separate steps for bead collection and release are used, then ease of operation is improved, but processing time and productivity worsen
Solution Approach 1:
The magnetic rack enables continuous operation by allowing bead collection and bead release to occur simultaneously or in rapid succession without interruption. While magnets are positioned for bead collection in one location, other magnets can simultaneously perform bead release in another location, eliminating idle time between steps and reducing overall processing time while maintaining ease of operation through automated sequencing.
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 magnetic rack facilitates rapid and efficient separation of magnetic beads from samples, allowing for improved handling and processing of nucleic acids, enhancing the reproducibility and success rate of nucleic acid extraction and purification processes.
Implementation Method 1
a magnet holder (16) engaging the timing belt, wherein the magnet holder (16) is configured to hold one or more magnets (20)
Data Source
AI summary
In some aspects, the present disclosure provides a magnetic rack comprising a lateral movement structure and/or a longitudinal movement structure. In particular embodiments, the lateral movement structure and/or longitudinal movement structure move one or more magnets to or away from a reaction tube, in order to control the magnetic forces exerted on microbeads in the reaction tube. The microbeads are attracted onto the reaction tube wall, thereby facilitating separation of the microbeads from a solution in the tube. In particular embodiments, the magnetic rack is used to extract or purify nucleic acid from a sample.