Eutectic Thaw Indicator Composition for Biospecimen Integrity
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Solution Overview
Problem
Current methods lack effective tools for evidence-based tracking of biospecimen exposure to thawed conditions, leading to compromised integrity and false results in biomedical research due to improper handling and storage.
Innovation Solution
An indicator system comprising permanganate, an organic reducing agent, an acid, an aqueous solvent, and an inorganic perchlorate salt forms a eutectic composition that changes color upon thawing, allowing visual assessment of biospecimen integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard operating procedures and documentation are used to track biospecimen storage conditions, then some level of tracking is achieved, but the method is complex and rarely employed in practice
Solution Approach 1:
The patent employs a colorimetric indicator system that changes color based on time-temperature exposure conditions. The indicator contains a pH-sensitive dye that shifts from green (proper storage) to red (improper exposure) when the biospecimen is exposed to temperatures above the eutectic point for excessive time, providing immediate visual feedback without complex documentation systems.
Solution Approach 2:
The indicator system is self-monitoring and self-reporting. It automatically detects and records time-temperature exposure conditions through the color change mechanism, eliminating the need for manual tracking by researchers. The system serves itself by providing real-time visual information about storage conditions without human intervention.
2Reliability
If evidence-based tracking tools are implemented for individual aliquot-level monitoring, then biospecimen integrity is improved, but the device complexity and cost increase
Solution Approach 1:
The patent uses a simple colorimetric indicator that provides visual confirmation of proper storage conditions at the individual aliquot level. The color change from green to red clearly indicates whether the biospecimen has been exposed to improper temperatures, offering straightforward evidence-based tracking without complex instrumentation.
Solution Approach 2:
The indicator system is designed as a disposable, low-cost component that can be attached to or incorporated into individual biospecimen aliquots. Each indicator is inexpensive to manufacture and use, allowing widespread implementation for tracking individual samples without significant financial burden on research facilities.
3Loss of time
If visual indicators are used for rapid assessment of biospecimen conditions, then time for assessment is reduced, but the precision of temperature tracking may be compromised
Solution Approach 1:
The patent employs a pH-sensitive colorimetric indicator that provides immediate visual feedback on time-temperature exposure. The color transition occurs rapidly when exposure thresholds are exceeded, allowing researchers to instantly assess whether biospecimens have been improperly stored without waiting for complex measurements or calculations.
Solution Approach 2:
The indicator system monitors cumulative time-temperature exposure by detecting changes in the chemical environment (pH changes) that occur when biospecimens are exposed to improper conditions. The color change reflects the integrated exposure history rather than instantaneous conditions, providing precise information about total exposure while enabling rapid visual assessment.
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
Provides instant visual assessment of biospecimen integrity at the individual aliquot level, tracking limited exposure to contraindicated temperatures, and ensuring accurate storage conditions without sample consumption or disturbance.
Implementation Method 1
a mixture of the permanganate, the organic reducing agent, the acid, the aqueous solvent, and the inorganic perchlorate salt is an eutectic composition having a predetermined freezing point
Implementation Method 2
at temperature above the predetermined freezing point, the organic reducing agent causes a reduction reaction of permanganate to Mn2+
Implementation Method 3
the organic reducing agent causes a reduction reaction of perchlorate to Mn2+
Implementation Method 4
at temperature below the predetermined freezing point the reduction reaction is stopped
Data Source
AI summary
An indicator system comprising permanganate, an organic reducing agent, an acid, and an inorganic perchlorate salt is provided herein. Methods for using the indicator system to monitor the integrity of a biospecimen are also provided. The systems and methods herein may provide easy-to-use, individual aliquot-level thawed-state indicators for indicating biospecimen time-temperature exposure.