Magnetic Bead Preservation Solution with Surfactant and Salt
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Solution Overview
Problem
Current preservation solutions for magnetic beads have a short shelf life and poor preservation effectiveness, leading to aggregation issues that affect separation and detection results, and are not tolerant of temperature variations, limiting their logistical and storage efficiency.
Innovation Solution
A preservation solution comprising a surfactant, a water-soluble salt, a bacteriostatic agent, and ethylenediaminetetraacetic acid, with specific concentration ranges for each component, including a surfactant like polysorbate-20, sodium dodecyl sulfate, and sorbitan fatty acid esters, and water-soluble salts such as calcium and magnesium chlorides, along with broad-spectrum antibiotics, to maintain monodispersity and prevent bacterial growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional preservation solutions are used for magnetic beads, then the magnetic beads can be stored, but they aggregate quickly and have short shelf life
Solution Approach 1:
The patent uses a composite preservation solution containing multiple components working together: surfactants (polysorbate-20, sodium dodecyl sulfate, sorbitan fatty acid esters) to prevent aggregation, water-soluble salts (calcium chloride, magnesium chloride) to maintain stability, and bacteriostatic agents (chloramphenicol, tetracycline, vancomycin) to prevent bacterial growth. This multi-component composite approach resolves the contradiction by simultaneously maintaining monodispersity and extending shelf life.
Solution Approach 2:
The patent specifies precise concentration ranges for each component: surfactant at 0.5%-5%, water-soluble salt at 1-3 mol/L, and bacteriostatic agent at 0.1%-0.5% volume percentage. By optimizing these parameters, the solution maintains magnetic bead monodispersity while extending preservation duration to several months, resolving the contradiction between stability and shelf life.
2Adaptability or versatility
If conventional preservation solutions are used, then magnetic beads can be preserved, but they are not tolerant of temperature variations
Solution Approach 1:
The patent specifies storing magnetic beads at 4°C to 8°C, optimizing the temperature parameter to balance preservation effectiveness and temperature tolerance. The composite solution formulation maintains reliability within this temperature range while providing adaptability to typical refrigeration conditions, resolving the contradiction between temperature tolerance and preservation effectiveness.
3Ease of manufacture
If magnetic beads are preserved without proper solution, then storage is simple, but aggregation occurs affecting separation and detection
Solution Approach 1:
The preservation solution contains bacteriostatic agents that automatically prevent bacterial growth and surfactants that continuously prevent aggregation without requiring external intervention. This self-service mechanism maintains separation quality while keeping storage simple, resolving the contradiction between ease of manufacture and manufacturing precision.
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 solution extends the shelf life of magnetic beads, maintains their monodispersity, and prevents aggregation, thereby improving their stability and preservation time while ensuring antibacterial protection, even at temperatures between 4° C to 8° C.
Implementation Method 1
The preservation solution of magnetic beads includes a surfactant
Implementation Method 2
the surfactant includes an ionic surfactant or a nonionic surfactant
Implementation Method 3
a water-soluble salt and a bacteriostatic agent... water-soluble salt is selected from one of divalent salts or a plurality of combinations of the divalent salts
Implementation Method 4
the bacteriostatic agent is selected from antibiotics... the antibiotics are broad-spectrum antibiotics
Implementation Method 5
the preservation solution of magnetic beads further includes ethylenediaminetetraacetic acid
Implementation Method 6
the preservation solution of magnetic beads further includes a buffer agent, an additive amount of the buffer agent causes a pH value of the preservation solution is in a range of 7.5 to 8.5
Data Source
AI summary
A preservation solution of magnetic beads includes a surfactant, a water-soluble salt and a bacteriostatic agent.