Multi-Electrode Sensing Assembly for Wide-Range Analyte Detection
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Solution Overview
Problem
Existing biosensor and chemical assay designs face challenges in making quantitative measurements of analytes over a wide range of concentrations, often requiring a trade-off between sensitivity and detection range.
Innovation Solution
A sensing assembly with multiple test electrodes, each having varying saturation limits and analyte interaction portions, along with control electrodes providing independent measurements, allows for broader dynamic range and improved accuracy by processing multiple signals from these electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single test electrode with fixed saturation limit is used, then the measurement is simple and device complexity is low, but the measurement precision and reliability deteriorate at high analyte concentrations due to the hook effect
Solution Approach 1:
The sensing assembly is segmented into multiple test electrodes, each with different saturation limits. This segmentation allows the system to measure analyte concentrations across a wider range by selecting the appropriate electrode based on the expected concentration level, thereby maintaining measurement precision while avoiding the hook effect that plagues single-electrode designs.
Solution Approach 2:
Each test electrode is given a different local quality in terms of saturation limit characteristics. By varying the saturation limits across different electrodes rather than using a uniform design, the system can optimally measure different concentration ranges, improving overall measurement precision without requiring a single complex electrode design.
2Adaptability or versatility
If multiple test electrodes with varying saturation limits are used, then the measurement precision and dynamic range improve, but the device complexity increases
Solution Approach 1:
The detection system is divided into multiple specialized electrodes, each optimized for a specific concentration range through different saturation limits. This segmentation enables the system to adapt to various analyte concentrations by activating the appropriate electrode, thereby expanding the detectable range while keeping each individual electrode relatively simple in design.
Solution Approach 2:
The sensing assembly achieves multi-functionality by incorporating multiple test electrodes with different saturation limits into a single device. This universal design allows the same sensing assembly to accurately measure analyte concentrations across a broad spectrum, from low to high concentrations, without requiring multiple separate devices.
3Reliability
If control electrode areas are added for independent measurements, then the reliability and accuracy improve through correction of non-specific signals, but the device complexity and manufacturing cost increase
Solution Approach 1:
Control electrode areas serve as intermediary elements that measure non-specific signals and background interference. By introducing these control electrodes as mediators, the system can distinguish between specific analyte binding and non-specific effects, thereby improving measurement reliability and accuracy without requiring fundamental changes to the core sensing mechanism.
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 more accurate and reliable determination of analyte concentrations across a wider range by utilizing the varying saturation limits and independent control measurements, reducing the 'hook effect' at high concentrations.
Implementation Method 1
Each of the test electrodes has an analyte interaction portion configured to selectively interact with the analyte
Data Source
AI summary
The present disclosure provides a sensing assembly for sensing an analyte. The sensing assembly comprises multiple test electrodes configured to provide signals from multiple independent measurements in response to the analyte. Alternatively or additionally, the multiple test electrodes are configured to produce different transient responses in response to a given concentration of the analyte.