Microfluidic Visual Quantification Device for Target Species
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Solution Overview
Problem
Existing methods for detecting and quantifying target chemical species in samples, such as in disease diagnosis and environmental monitoring, often require cumbersome and power-dependent equipment, and provide only qualitative results, making them unsuitable for resource-limited settings and lacking in quantitative measurement capabilities.
Innovation Solution
A microfluidic device with an inlet, separator, and trap that allows for the visual quantification of target species in a sample solution, using magnetic or chemical separation methods, and a self-driven capillary pump for operation without electric power, enabling direct or indirect measurement through correlation with trapped species visible in a transparent trap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated equipment such as spectrometer or fluorescence microscope is used for detection and analysis, then measurement precision is improved, but device complexity and portability are worsened
Solution Approach 1:
The invention extracts the quantification function from complex dedicated equipment and implements it through a simple microfluidic device with visual readout. The device separates target species using magnetic particles and quantifies them through visual assessment of trapped species in a trap chamber, eliminating the need for bulky spectrometers or fluorescence microscopes while maintaining quantification capability
Solution Approach 2:
The invention creates a visual copy of the quantitative information through the fuel-gauge display. The trapped species form a visible accumulation in the trap chamber that directly represents the amount of target species, allowing quantification without requiring complex optical measurement equipment
2Measurement precision
If dedicated equipment with electric power is used for detection, then measurement precision is improved, but ease of operation in resource limited settings is worsened
Solution Approach 1:
The microfluidic device is designed to be self-driven through capillary action, eliminating the need for external power sources. The device automatically transports samples and reagents through the microfluidic channels and performs separation and trapping functions without requiring electric power, making it suitable for resource-limited settings while maintaining quantification accuracy
Solution Approach 2:
The invention uses disposable microfluidic devices with integrated magnetic particles and reagents. Each device is pre-prepared with all necessary components and can be used once without requiring expensive, maintainable equipment, making it ideal for portable use in resource-limited environments
3Ease of operation
If lateral flow strip or colorimetric assay is used for detection, then ease of operation is improved, but measurement precision is worsened
Solution Approach 1:
The invention replaces the qualitative optical detection of lateral flow strips with a mechanical/physical trapping mechanism followed by visual quantification. Magnetic particles selectively trap target species in a controlled trap chamber, and the amount of trapped species is visually quantified through the fuel-gauge display, providing quantitative measurement while maintaining ease of operation
Solution Approach 2:
The invention utilizes the visual detectability of trapped species through color or optical properties. The trapped species accumulate in the trap chamber and can be visually assessed through their color, turbidity, or other optical characteristics, providing quantitative information without requiring complex spectral analysis equipment
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 device provides a portable, low-cost, and energy-efficient means for quantitative visual detection of target species, offering intuitive measurement through a visible fuel-gauge display, with applications in disease diagnosis, environmental monitoring, and water safety, demonstrating sensitivity and selectivity comparable to UV/Vis spectrometry.
Implementation Method 1
the separator may be a magnetic separator, which separates one or more species from the sample solution via magnetic interaction
Implementation Method 2
the source comprises a self-driven capillary pump
Data Source
AI summary
A device for visual quantification of an amount of target species in a sample solution. The device includes an inlet, a separator, and a trap. The inlet is arranged to receive the sample solution. The separator in fluid communication with the inlet and arranged to separate one or more species from the sample solution. The trap is arranged downstream of the separator, in fluid communication with the separator, and arranged to trap one or more species of the sample solution. The trap is arranged such that the trapped species is visible for determination of the amount of target species in the sample solution.