Stabilising Fatty Acids on Chelating Antioxidant Paper
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Solution Overview
Problem
Current methods for determining fatty acid levels in blood samples, such as the Omega 3 Index, face challenges due to significant degradation of fatty acids over time, especially when stored on conventional filter papers, making them impractical for long-term stability and accurate analysis.
Innovation Solution
A method involving the application of fatty acids to a solid medium with a chelating agent like EDTA and an antioxidant like BHT on silica-gel loaded paper, which minimizes contamination and maintains fatty acid stability for months at ambient conditions, allowing for accurate determination of fatty acid composition weeks or months after sample application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional filter paper is used to store blood samples, then sample collection is simple, but fatty acid degradation occurs significantly over time
Solution Approach 1:
The filter paper is pre-treated with antioxidants (such as BHT) and metal chelating agents (such as EDTA) before sample collection. This preliminary action prevents fatty acid oxidation from the outset, allowing the sample to remain stable during storage and transport without requiring immediate analysis or specialized storage conditions.
Solution Approach 2:
Antioxidants and metal chelating agents are introduced as intermediary substances between the fatty acids and the degrading environment. These intermediaries actively prevent oxidation by scavenging free radicals and chelating metal ions that would otherwise catalyze fatty acid degradation, thereby preserving sample integrity.
2Measurement precision
If blood samples are analyzed immediately, then fatty acid composition is accurate, but time and logistics are constrained
Solution Approach 1:
The filter paper is pre-treated with antioxidants (such as BHT) and metal chelating agents (such as EDTA) before sample collection. This preliminary action prevents fatty acid oxidation from the outset, allowing the sample to remain stable during storage and transport without requiring immediate analysis or specialized storage conditions.
Solution Approach 2:
The invention changes the chemical environment parameters of the storage medium by incorporating specific concentrations of antioxidants and chelating agents. This parameter modification creates a protective atmosphere that maintains fatty acid stability over extended periods, decoupling measurement accuracy from immediate analysis timing.
3Stability of the object's composition
If antioxidants and chelating agents are added to stabilize fatty acids, then storage stability improves, but sample preparation complexity increases
Solution Approach 1:
The invention merges the collection medium (filter paper) with stabilizing agents (antioxidants and chelating agents) into a single integrated product. This combination eliminates the need for separate stabilization steps, as the protective agents are already incorporated into the paper matrix, simplifying the overall sample preparation process.
Solution Approach 2:
The filter paper with incorporated antioxidants and chelating agents provides self-service stabilization. The paper automatically protects the fatty acid samples through its built-in chemical defenses, eliminating the need for external intervention or complex preparation procedures by the user.
4Reliability
If multiple stabilization agents are used, then fatty acid protection is enhanced, but cost and manufacturing complexity increase
Solution Approach 1:
The invention merges the collection medium (filter paper) with stabilizing agents (antioxidants and chelating agents) into a single integrated product. This combination eliminates the need for separate stabilization steps, as the protective agents are already incorporated into the paper matrix, simplifying the overall sample preparation process.
Solution Approach 2:
The invention creates a composite material by combining filter paper with antioxidants and metal chelating agents. This composite structure integrates the functional properties of each component - the paper provides structural support and absorption, while the chemical agents provide stabilization - resulting in a manufacturable product with enhanced performance.
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 approach provides a reliable, simple, and cost-effective means to stabilize fatty acids in blood samples, enabling accurate measurement of omega-3 fatty acid levels without the need for immediate analysis, thus overcoming the limitations of existing methods by ensuring minimal degradation and accurate results over time.
Implementation Method 1
A method for stabilising fatty acids present in a sample such as bodily fluids by applying the fatty acids, or the sample, to a solid medium which comprises a solid matrix, at least one chelating agent and at least one antioxidant
Implementation Method 2
A method for stabilising fatty acids present in a sample such as bodily fluids by applying the fatty acids, or the sample, to a solid medium which comprises a solid matrix, at least one chelating agent and at least one antioxidant
Implementation Method 3
A method involving the application of fatty acids to a solid medium with a chelating agent like EDTA and an antioxidant like BHT on silica-gel loaded paper
Data Source
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AI summary
The invention relates to a method for stabilising fatty acids present in a sample such as bodily fluids (e.g. blood, saliva, breast milk, urine, semen, blood plasma and serum), using a solid medium (such as paper, a glass-based matrix, a paper-based matrix, a cellulose-based matrix, hydrophilic polymers, polytetrafluoroethylene, fibreglass and porous ceramics) comprising chelating agents (e.g. ethylenediamine-tetraacetic acid, ascorbic acid, citric acid, or salts thereof), antioxidants (e.g. butylated hydroxytoluene, butylated hydroxyanisole or t-butylhydroquinone) and less than than about 2 μg/cm2 of contaminants which is capable of stabilising fatty acids applied thereto, and a method for preparing such media. The invention further relates to a method for determining the fatty acid composition of a sample stored on such a medium.