Biosensor Sampling Unit with Segmented Receiving Parts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional biosensors face challenges in noninvasively detecting substances like glucose in human bodily fluids, such as tears and saliva, due to interference from proteins that reduce measurement sensitivity.
Innovation Solution
A biosensor system with a sampling unit featuring separate receiving parts, one with a molecular imprinted polymer gel layer to selectively bind glucose and another with a salt bridge for electrical connection, minimizing protein interference and enhancing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer biosensor structure is used to simplify device complexity, then manufacturing precision and ease of manufacture improve, but measurement precision deteriorates due to protein interference from noninvasive samples
Solution Approach 1:
The biosensor is divided into multiple functional layers: a first receiving part with an identification substance for selective binding, a second receiving part for reference measurements, and a blocking layer with high molecular weight compounds to eliminate proteins. This segmentation allows each layer to perform its specific function, improving measurement precision while maintaining manageable device complexity through modular design
Solution Approach 2:
Different regions of the biosensor are assigned different functional properties: the first receiving part contains identification substances for target detection, the blocking layer contains high molecular weight compounds for protein elimination, and the second receiving part provides reference measurements. This local differentiation of qualities enables simultaneous optimization of specificity, sensitivity, and robustness against protein interference
2Ease of operation
If noninvasive sampling is used to reduce burden on human body, then ease of operation improves, but measurement precision deteriorates due to protein interference in samples like tears and saliva
Solution Approach 1:
The blocking layer extracts and removes proteins from the sample solution using high molecular weight compounds that bind to and eliminate interfering proteins. This extraction process separates the target analyte from interfering substances, allowing noninvasive samples to be used without sacrificing measurement precision
Solution Approach 2:
The identification substance acts as an intermediary between the target analyte and the detection system, providing selective binding that enhances measurement precision. The blocking layer compounds serve as intermediaries that specifically interact with and remove protein interferents, protecting the detection system from their adverse effects
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 system improves measurement sensitivity by selectively binding glucose and preventing protein interference, allowing for reliable noninvasive detection of glucose in bodily fluids.
Implementation Method 1
the gel layer comprises a molecular imprinted polymer having molecular templates corresponding to the substance to be detected
Implementation Method 2
the inhibitory substance is formed with a high molecular weight compound and has an action to eliminate proteins
Implementation Method 3
the second receiving part has a salt bridge part established on the tip of a reference electrode
Data Source
Figure 1~2
Figure 3~4B
AI summary
A sampling unit having a first receiving part (16) and a second receiving part (18), which receive a sample solution and are disposed separately from each other, wherein the first receiving part (16) comprises an identification substance (22) that binds to a substance to be detected, and separates the substance to be detected from substances not to be detected in the sample solution, and the second receiving part (18) is connected with a reference electrode (21) via a salt bridge part (25) .