Acoustic Wave Sensor Equilibration via Analyte Depletion
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Solution Overview
Problem
Acoustic wave sensor devices face challenges in accurately discriminating changes in propagation characteristics due to analyte binding from those caused by viscosity and non-specific binding associated with sample composition.
Innovation Solution
The method involves treating a portion of the sample composition to deplete or block the analyte, using this treated composition to equilibrate the sensor, and then analyzing the untreated sample composition to improve accuracy by minimizing interference from viscosity and non-specific binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is exposed directly to the sample composition for analyte detection, then the detection process is simple and fast, but the accuracy is compromised due to interference from viscosity and non-specific binding changes
Solution Approach 1:
The sample composition is divided into two separate portions: a first portion used for sensor equilibration and a second portion used for analyte detection. This segmentation allows the sensor to be pre-equilibrated with the sample matrix to account for viscosity and non-specific binding effects, while the second portion provides the actual analyte measurement, thereby improving accuracy without requiring complex real-time corrections.
Solution Approach 2:
The sensor equilibration process is performed in advance using the first portion of the sample composition before the actual analyte detection with the second portion. This preliminary action establishes a baseline that compensates for viscosity and non-specific binding characteristics, allowing the subsequent analyte detection to be more accurate by isolating the analyte binding signal from matrix interferences.
2Measurement precision
If the sensor is equilibrated with the sample composition to account for viscosity and non-specific binding, then the accuracy of analyte detection is improved, but the time required for analysis increases
Solution Approach 1:
By segmenting the sample composition into two portions and using the first portion solely for equilibration, the system can perform the time-consuming equilibration process in advance without delaying the actual analyte detection. The equilibration step is separated from the measurement step, allowing optimization of each independently.
Solution Approach 2:
The equilibration using the first portion of the sample composition is performed as a preliminary step before the actual analyte detection. This allows the sensor to be pre-conditioned with the sample matrix characteristics, and the time required for equilibration is incurred before the critical measurement phase, thereby not extending the total analysis time significantly.
3Ease of operation
If the same sample composition is used for both equilibration and detection, then the process is simplified, but the ability to isolate analyte binding signal is reduced
Solution Approach 1:
The sample composition is segmented into a first portion for equilibration and a second portion for detection. This segmentation allows the first portion to be used exclusively for establishing baseline conditions with the sample matrix, while the second portion is used for actual analyte measurement. This separation enables clear isolation of the analyte binding signal from viscosity and non-specific binding interferences.
Solution Approach 2:
The first portion of the sample composition acts as an intermediary medium that enables the sensor to equilibrate with the sample matrix characteristics before the second portion is used for detection. This intermediary approach allows the sensor to account for viscosity and non-specific binding effects without interfering with the actual analyte measurement process.
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
This approach enhances the accuracy of analyte detection by isolating the effects of analyte binding from other sample composition-related changes in wave propagation characteristics, leading to more reliable analysis results.
Implementation Method 1
The analyte may bind to the biomolecule attached to the surface of the sensor and increase the mass bound to the sensor. The increased mass alters the wave propagation characteristics (e.g., magnitude, frequency, phase, etc.) of the sensor.
Implementation Method 2
contacting a first portion of the composition with a material configured to block or remove the analyte from the composition
Data Source
AI summary
Methods include treating a portion of a sample composition to be tested for presence of an analyte by depleting or blocking the target analyte. The treated composition may be used to equilibrate an acoustic wave sensor prior to exposing the sensor to the untreated sample composition for analysis. By using the treated sample composition, in which the analyte is depleted or blocked, to equilibrate the sensor, the sensor may be equilibrated with a composition having a similar viscosity and non-specific binding characteristics to the untreated sample composition, which should result in improved accuracy when analyzing the analyte in the untreated sample composition.