Surfactant Optimization for Bubble Adsorption in Dry Plastic Immunoassay Cells
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Solution Overview
Problem
In immunoassays using dry plastic cells, bubbles adsorbed on the cell's side surface deteriorate measurement accuracy, and the cause of this issue has not been effectively addressed.
Innovation Solution
Incorporating a surfactant, such as poly(oxyethylene) sorbitan fatty acid ester or polyoxyethylene tribenzyl phenyl ether, into the reaction and measurement system at a concentration of 0.01 to 0.3% to reduce bubble adsorption on the spectrophotometry surface during antigen-antibody reactions in immunoagglutination assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a surfactant is added to the reaction system, then bubble adsorption on the cell side surface is reduced and measurement accuracy is improved, but the complexity of the reagent composition increases
Solution Approach 1:
The patent applies parameter changes by optimizing the surfactant concentration to a specific range (0.01-0.3%) to achieve effective bubble adsorption reduction while minimizing reagent complexity. This quantitative parameter optimization resolves the contradiction by finding the optimal balance point where measurement accuracy is significantly improved without excessive complexity in reagent formulation.
Solution Approach 2:
The surfactant acts as an intermediary substance that mediates between the bubbles and the cell side surface. By introducing this intermediate agent, the patent reduces direct harmful interactions (bubble adsorption) without fundamentally changing the measurement system architecture, thus improving measurement accuracy while adding only minimal complexity through a single chemical additive.
2Stability of the object's composition
If a surfactant is used in the immunoassay system, then measurement stability is improved, but the cost and complexity of reagent preparation increase
Solution Approach 1:
The patent specifies a narrow concentration range (0.01-0.3%) for the surfactant, which optimizes measurement stability while simplifying reagent preparation. By defining precise parameter boundaries, the patent eliminates the need for complex preparation protocols and makes the reagent formulation straightforward, thus resolving the contradiction between stability improvement and preparation complexity.
3Measurement precision
If bubbles are present on the cell side surface, then light scattering occurs and measurement accuracy deteriorates, but adding surfactants increases reagent complexity
Solution Approach 1:
The surfactant serves as an intermediary that prevents direct adsorption of bubbles onto the cell side surface. This intermediary substance modifies the surface properties to reduce bubble adhesion, thereby eliminating the harmful light scattering effect without requiring complex physical modifications to the cell or measurement system.
Solution Approach 2:
By optimizing the surfactant concentration parameter within the range of 0.01-0.3%, the patent achieves effective suppression of bubble adsorption and associated light scattering. This parameter optimization resolves the contradiction by finding the minimum effective concentration that eliminates the harmful effect while minimizing reagent complexity.
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 presence of surfactants stabilizes measurement values and improves accuracy by reducing bubble adsorption, thereby enhancing the performance of automatic analyzers and expanding their applicability.
Implementation Method 1
allowing a surfactant to be present in a reaction and measurement system... the adsorption of the bubbles can be easily reduced by allowing a surfactant to be present
Implementation Method 2
adsorption of bubbles onto a cell side surface... bubbles are often adsorbed on a side surface of the cell
Data Source
AI summary
Provided is a means for improving measurement accuracy in an immunoassay using a dry plastic cell. A method for reducing adsorption of bubbles onto a cell side surface in an immunoassay, the method including carrying out a reaction and/or measurement in a presence of a surfactant, wherein the immunoassay comprises carrying out an antigen-antibody reaction in a dry plastic cell using an immunoassay reagent which immunologically reacts with a substance to be measured in a sample and carrying out an optical measurement of a resultant reacted product.