Fluorophore-Adhered Membrane Detection for Low-Preparation Field Testing
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Solution Overview
Problem
Existing water analysis technologies are costly, require significant sample preparation, and are limited to laboratory settings, making them unsuitable for point-of-access testing.
Innovation Solution
A method using a solid-phase extraction device with a fluorophore-adhered membrane for detecting analytes by measuring fluorescence intensity changes, achieving negligible depletion conditions to determine analyte presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hyphenated chromatographic-mass spectrometric techniques are used for water analysis, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the detection function from complex hyphenated systems and concentrates it into a single fluorophore-based sensor element. The fluorophore is incorporated into the solid-phase extraction membrane, allowing analyte detection through simple fluorescence measurement without requiring mass spectrometry or chromatography equipment.
Solution Approach 2:
The patent replaces complex mechanical and chemical separation systems (chromatography-mass spectrometry) with a optical detection system. Instead of using physical separation and mass analysis, the method uses fluorescence emission wavelength measurement to detect analytes, substituting complex mechanical/chemical processing with simpler optical measurement.
2Measurement precision
If electrochemistry, IR and Raman spectrometry are used for water analysis, then measurement precision is improved, but power requirement and sample preparation complexity increase
Solution Approach 1:
The fluorophore in the solid-phase extraction membrane performs both the separation and detection functions simultaneously. The membrane structure itself provides the sensing capability through fluorophore emission wavelength changes when analytes bind, eliminating the need for separate detection instruments and reducing power requirements.
3Measurement precision
If complex water analysis technologies are deployed, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The solid-phase extraction membrane serves multiple functions simultaneously: it performs solid-phase extraction of analytes from water samples and provides fluorescence-based detection in a single integrated component. This multi-functionality simplifies operation at point-of-access locations by eliminating the need for separate extraction and detection 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
Enables simple, sensitive, and reliable detection of analytes in liquid samples, with low detection limits and high selectivity, suitable for field applications.
Implementation Method 1
measuring fluorescence intensity of a surface on the solid-phase extraction membrane at an emission wavelength
Data Source
AI summary
Described are methods for detecting an analyte in a liquid sample using negligible depletion and a fluorophore adhered to a solid phase extraction membrane.