pH-Sensitive Indicator Dye Matrix for Meat Spoilage Detection
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Solution Overview
Problem
Meat-based food products spoil quickly due to cryophilic microorganisms, leading to short shelf-lives and public health concerns, despite proper storage, and existing methods for detecting bacterial contamination are time-consuming, require specialized equipment, and are not practical for quick assessment.
Innovation Solution
A device comprising a substrate with a carboxyl-rich biomass binder, clay, and pH-sensitive indicator dye that changes color in response to volatile compounds produced by spoilage microorganisms, allowing for rapid detection of meat spoilage without specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional laboratory methods are used to measure bacterial contamination, then measurement precision is improved, but loss of time increases significantly
Solution Approach 1:
The patent extracts the detection function from complex laboratory environments and implements it in simple packaging materials. The pH-sensitive indicator dye is incorporated directly into the packaging, allowing detection to occur in situ rather than requiring sample transport to laboratories, thus dramatically reducing detection time while maintaining measurement capability.
Solution Approach 2:
The patent introduces pH-sensitive indicator dyes as intermediaries that indirectly detect bacterial contamination. Instead of directly measuring bacteria, the system uses the dyes to respond to pH changes caused by bacterial metabolic activity, providing a time-efficient proxy measurement that maintains diagnostic value.
2Measurement precision
If conventional laboratory methods with specialized equipment are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent employs disposable pH-sensitive indicator dyes embedded in packaging materials that can be discarded after use. These simple, inexpensive indicators replace complex, expensive laboratory equipment while providing sufficient detection capability for their intended short-term use in food packaging.
Solution Approach 2:
The patent replaces mechanical and electronic laboratory detection systems with a chemical-based colorimetric system. The pH-sensitive dyes provide visual signals through color changes, eliminating the need for sophisticated instruments, power supplies, and trained operators while maintaining measurement functionality.
3Loss of time
If rapid detection methods are used, then loss of time is reduced, but measurement precision deteriorates
Solution Approach 1:
The pH-sensitive indicator dyes are pre-positioned in the packaging materials before food placement. This preliminary arrangement allows immediate detection to begin as soon as the packaged food is sealed, eliminating sample preparation time and enabling rapid detection without compromising measurement quality.
Solution Approach 2:
The detection system is self-powered and self-indicating, requiring no external energy sources or complex processing. The pH-sensitive dyes automatically respond to bacterial metabolic products through color changes, providing both rapid and reliable measurement without requiring additional time for analysis or interpretation by specialists.
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
Enables quick and cost-effective detection of meat spoilage, reducing food wastage and ensuring consumer safety by indicating when meat has reached unsafe microbial contamination levels.
Implementation Method 1
a pH-sensitive indicator dye that changes color in response to contact with a pre-determined concentration of volatile compounds
Data Source
AI summary
A device for detecting volatile compounds. The device includes a substrate and a matrix disposed on the substrate. The matrix includes a carboxyl-rich binder, a clay, and a pH-sensitive indicator dye admixed with the binder and the clay. The pH-sensitive indicator dye is dimensioned and configured to change color in response to contact with a pre-determined concentration of a volatile compound.