Polymeric Indole Detection Tool with Real-Time Color Change
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Solution Overview
Problem
Existing sensors are inadequate for real-time and continuous detection of indole-producing bacteria or chemicals, which are indicative of certain infections and food contamination, particularly in bodily fluids and food samples.
Innovation Solution
A polymeric detection tool impregnated with a nitrosation agent, such as S-nitroso-N-acetylpenicillamine (SNAP), embedded in an acidic and oxygen-soluble polymer, which converts indole into a red-colored product for visual detection, either in solution or integrated into medical devices like catheters and patches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing sensors are used for detection, then detection capability is provided, but real-time and continuous detection of indole-producing bacteria or chemicals is not achieved
Solution Approach 1:
The patent employs a colorimetric detection method where indole reacts with nitrosation agent to produce a red-colored product. This color change enables visual detection and provides real-time feedback, resolving the contradiction between detection capability and real-time continuous detection.
Solution Approach 2:
The detection tool uses the natural metabolic product (indole) of the bacteria as the analyte itself, eliminating the need for complex molecular identification. The system self-regulates through the colorimetric reaction, providing continuous detection without external intervention.
2Measurement precision
If detection methods are developed for indole-producing bacteria, then detection specificity is improved, but interference from other compounds increases
Solution Approach 1:
The patent optimizes the reaction conditions including pH level, temperature, and reagent concentrations to enhance the specificity of the colorimetric reaction. By controlling these parameters, the method achieves high detection specificity while minimizing interference from other compounds in the sample matrix.
3Loss of time
If rapid detection is achieved, then diagnosis time is reduced, but detection sensitivity may be compromised
Solution Approach 1:
The detection method provides continuous real-time monitoring through the colorimetric reaction, allowing rapid detection without sacrificing sensitivity. The continuous nature of the reaction enables both speed and accuracy to be achieved simultaneously.
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 method provides rapid, specific, and sensitive detection of indole-producing bacteria or chemicals, enabling early diagnosis of infections and assessment of food freshness, with high selectivity and minimal interference from other compounds.
Implementation Method 1
A polymeric detection tool impregnated with a nitrosation agent, such as S-nitroso-N-acetylpenicillamine (SNAP), embedded in an acidic and oxygen-soluble polymer, which converts indole into a red-colored product for visual detection
Data Source
AI summary
In an example method for detecting indole, an indole producing bacterium, or an indole producing chemical, a polymeric detection tool is exposed to a sample and the polymeric detection tool is monitored for a red color change. The polymeric detection tool includes an acidic and oxygen soluble polymer and a nitrosation agent impregnated in walls of the acidic and oxygen soluble polymer. This example method can be used for detecting an indole producing bacterium in a body fluid sample.