Magnetic Particle Tagged Reagents for Fluid Separation
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Solution Overview
Problem
Current methods for separating materials of interest from contaminating materials in assays and diagnostic procedures are often cumbersome, requiring centrifugation, large volumes of wash solutions, and complex instrumentation, which can lead to inefficiencies and contamination issues, especially in blood bank diagnostics and chemical synthesis.
Innovation Solution
The use of magnetic particles attached to binding partners that are moved through a continuous liquid medium with varying specific gravity zones, utilizing magnetic forces to separate materials of interest from contaminants, allowing for flotation-based separation and elimination of unbound materials, thereby simplifying the process and reducing the need for centrifugation and fluid handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If centrifugation and large volumes of wash solutions are used to separate materials of interest from contaminants, then separation effectiveness is improved, but device complexity and loss of substance increase
Solution Approach 1:
The patent replaces complex mechanical separation systems (centrifuges, multiple wash stations) with a simple magnetic field application system. Magnetic particles attached to binding partners are manipulated using magnets to separate bound from unbound materials, eliminating the need for centrifugation and extensive fluid handling infrastructure.
Solution Approach 2:
The invention extracts the separation function from complex mechanical systems and concentrates it into magnetic particles that can be manipulated by simple magnetic fields. The magnetic particles carrying bound materials are physically extracted from the mixture through magnetic attraction, achieving separation without complex equipment.
2Manufacturing precision
If centrifugation and extensive washing are used to separate materials of interest from contaminants, then separation effectiveness is improved, but loss of substance and time increase
Solution Approach 1:
The patent applies magnetic field strength that is sufficient to separate bound materials but not excessive enough to disrupt the binding interactions or cause non-specific losses. This optimized level of magnetic action achieves effective separation while minimizing loss of valuable materials.
Solution Approach 2:
Gentle magnetic manipulation replaces harsh mechanical centrifugation and extensive washing, reducing material loss while achieving equivalent or superior separation effectiveness.
3Manufacturing precision
If centrifugation and complex instrumentation are used to separate materials of interest from contaminants, then separation effectiveness is improved, but productivity decreases
Solution Approach 1:
The patent replaces time-consuming centrifugation and complex fluid handling with rapid magnetic field application and removal. Magnetic particles can be quickly attracted to and removed from the reaction mixture, dramatically reducing separation time and increasing throughput.
Solution Approach 2:
The binding partners are pre-attached to magnetic particles before the separation step, so that when the magnetic field is applied, separation occurs immediately without requiring preliminary setup of complex instrumentation or lengthy processing steps.
4Manufacturing precision
If centrifugation and multiple wash steps are used to separate materials of interest from contaminants, then separation effectiveness is improved, but ease of operation worsens
Solution Approach 1:
The patent replaces cumbersome centrifugation and multiple wash steps with simple magnetic field application. A magnet can be placed directly against the reaction vessel to separate bound materials, and the magnetic field can be removed to release materials, making the process as easy as placing and removing a magnet.
Solution Approach 2:
The magnetic particles self-assemble and self-separate under the influence of the magnetic field without requiring external manipulation. The bound materials automatically concentrate at the magnetic field source, and unbound materials remain in solution, providing automatic separation that simplifies operation.
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 method simplifies the separation process, reduces contamination risks, and enhances the efficiency of assays and diagnostics by allowing for the precise separation of materials of interest without the need for extensive washing or centrifugation, making it applicable to various scientific and industrial applications, including blood bank testing and chemical synthesis.
Implementation Method 1
utilizing magnetic forces to separate materials of interest from contaminants
Implementation Method 2
utilizing buoyant forces with reactive magnetic particles and liquids of selected specific gravity
Data Source
AI summary
Methods for separating, in a continuous, multizone fluid medium, cells, particles, or other molecules of interest (MOI) from associated or contaminating unwanted materials not of interest (MNOI). The invention involves forced movement of MOI into certain zones having properties which deter the entry of unwanted materials. Differential movement of MOI and MNOI occurs by active counterforces that move MNOI but not MOI. MOI are tagged with magnetic particles and moved with a magnetic field through a fluid, or zones, of higher specific gravity that prevents, by flotation counterforce, unwanted less dense materials from entering.Surfaces specifically coated with reactants are reactive with the MOI in the tagged magnetic particle complex and of buoyant or other forces are used to remove any unbound material from the surface before reading. Readable labels, in addition to the magnetic particle tagged complex itself, such as enzymes, fluorophors, chemiluminescent materials, radioactive isotopes, chromogenic and fluorogenic substrates and other labels may be used. In most embodiments, materials of interest are delivered to a special final zone for reading or harvesting. The invention applies to many assays, diagnostic tests, separative procedures and chemical syntheses.