Immunochromatography Developing Solution Dispersion Stability
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Solution Overview
Problem
Conventional immunochromatography methods face challenges in achieving high sensitivity for detecting low-concentration substances while controlling false positive reactions and ensuring proper dispersion of insoluble carrier labels, leading to reduced signal amplification and increased measurement time.
Innovation Solution
A developing solution for immunochromatography comprising a vinyl-based water-soluble polymer with oxygen and nitrogen atom-containing polar groups and a non-ionic surface active agent is used, which stabilizes the dispersion of insoluble carrier labels and enhances signal amplification by promoting their binding, thereby improving sensitivity and signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a dispersion stabilizer is added to the developing solution to stabilize the dispersion state of the detection reagent, then the dispersion stability is improved, but the viscosity of the developing solution increases and the development rate decreases
Solution Approach 1:
The patent applies parameter changes by selecting a dispersion stabilizer with specific molecular weight range (10,000 to 1,000,000) and concentration range (0.01 to 5% by weight). This optimized parameter selection achieves adequate dispersion stability while controlling viscosity increase to maintain acceptable development rates, resolving the contradiction between stability and speed.
2Measurement precision
If the development time is extended to improve detection sensitivity, then the measurement precision is improved, but the measurement time increases and false positive reactions occur
Solution Approach 1:
The patent changes parameters by optimizing the concentration of the dispersion stabilizer (0.01 to 5% by weight) and the molecular weight of the polymer used. These parameter adjustments improve signal intensity and detection sensitivity within a standard development time period, eliminating the need for extended development times and preventing false positive reactions while maintaining high measurement precision.
3Reliability
If a dispersion stabilizer is added to prevent aggregation of the detection reagent, then the reliability is improved, but non-specific adsorption increases causing false positive reactions
Solution Approach 1:
The patent applies parameter changes by selecting specific polymer types (vinyl-based water-soluble polymers with oxygen and nitrogen atom-containing polar groups) and controlling their concentration (0.01 to 5% by weight). This optimized parameter selection achieves reliable prevention of detection reagent aggregation while minimizing non-specific adsorption, thereby maintaining measurement reliability and reducing false positive reactions.
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 solution enables precise and highly sensitive detection of low-concentration substances with reduced false positives, allowing for efficient immunochromatographic analysis with improved signal amplification and measurement speed.
Implementation Method 1
a vinyl-based water-soluble polymer having oxygen atom- and nitrogen atom-containing polar groups... stabilizes the dispersion of insoluble carrier labels
Implementation Method 2
a non-ionic surface active agent... promote their binding, thereby improving sensitivity and signal-to-noise ratio
Implementation Method 3
a method of binding an antigen or an antibody labeled with a label to a substance to be detected in a sample based on an immunological reaction and measuring the label in a bound state
Data Source
AI summary
Provided is a developing solution for immunochromatography that is precise and highly sensitive and is able to sufficiently detect even a low-concentration substance to be detected while controlling false positive reactions caused by non-specific adsorption of components other than the substance to be detected contained in a sample. The invention relates to a developing solution that contains a non-ionic surfactant and a vinyl-based water-soluble polymer having oxygen atom- and nitrogen atom-containing polar groups, for immunochromatography using a detection reagent labeled with an insoluble carrier.