Centrifugal Density Measurement for Nanoparticle Agglomerates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for determining the effective density of nanomaterial agglomerates in liquid suspension are time-consuming, expensive, and lack accuracy, which hampers the correlation of nanomaterial properties with their biological activity and toxicity, leading to disparities in in vitro and in vivo studies.
Innovation Solution
A method involving centrifugation of nanomaterial agglomerates in a liquid to separate a pellet and supernatant, measuring the pellet volume to calculate the effective density, which is then used to determine the sedimentation rate and delivery time of nanomaterials to cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (analytical ultracentrifugation, modeling) are used to determine effective density, then measurement precision can be achieved, but the process becomes time-consuming and expensive
Solution Approach 1:
The patent extracts the essential measurement function from complex analytical ultracentrifugation equipment and performs it using simple microcentrifuge tubes and a standard centrifuge. By removing unnecessary complex instrumentation while retaining the core separation principle, the method achieves effective density measurement without the time and cost constraints of conventional equipment.
Solution Approach 2:
The patent employs disposable microcentrifuge tubes as the measurement container, replacing expensive, maintenance-intensive analytical ultracentrifugation instruments. This disposable approach eliminates the need for costly equipment investment and reduces measurement time, making the method both economical and efficient.
2Measurement precision
If conventional methods are used to determine effective density, then measurement precision can be achieved, but the process becomes expensive
Solution Approach 1:
The patent uses inexpensive disposable microcentrifuge tubes instead of costly analytical ultracentrifugation equipment. This substitution maintains measurement validity while dramatically reducing the financial barrier to effective density determination, making the method accessible to broader research communities.
Solution Approach 2:
The patent extracts the essential measurement function from expensive analytical ultracentrifugation instruments and implements it using basic centrifugal separation principles with simple tubing. By removing the expensive equipment component while retaining the core measurement capability, the method achieves cost-effective precision.
3Productivity
If inaccurate effective density measurement methods are used, then measurement time and cost are reduced, but the accuracy of in vitro dosimetry and toxicity correlation is compromised
Solution Approach 1:
The patent extracts the essential measurement function from complex equipment and performs it using simple microcentrifuge tubes and standard centrifuges. By removing unnecessary complex instrumentation while retaining the core separation principle, the method achieves effective density measurement without the time and cost constraints of conventional equipment, while maintaining accuracy through proper protocol design.
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 provides a fast, cost-effective, and accurate estimation of effective density, improving the accuracy of in vitro dosimetry and understanding nanobiointeractions, thereby reducing discrepancies between in vitro and in vivo toxicity studies.
Implementation Method 1
centrifuging the dispersion at a speed sufficient to yield a supernatant and a pellet
Implementation Method 2
the sedimentation rate and delivery time of nanomaterials to cells
Data Source
AI summary
The invention includes a method of determining the effective density of nanomaterial agglomerates in liquids, such as but not limited to physiological fluids, using volumetric centrifugation. The method of the invention allows for the development of reliable and efficient in vitro dosimetry and methods for toxicological testing of engineered nanomaterials.