Linear Polymer Affinity Agent for Multiplex Mycotoxin SERS Detection
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Solution Overview
Problem
Current analytical techniques face challenges in simultaneously detecting multiple mycotoxins like deoxynivalenol (DON) and ochratoxin A (OTA) due to their varying molecular structures, often requiring separate analyses and post-measurement chemometric analyses, which is complex and costly.
Innovation Solution
A method using a linear polymer affinity agent capable of hydrogen bonding with mycotoxins, paired with surface-enhanced Raman scattering (SERS) and density functional theory (DFT), allows for direct multiplex detection of DON and OTA on a metal substrate without the need for chemometric analysis, enabling simultaneous detection at relevant regulatory concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional affinity agents are anchored onto a substrate and designed to be highly specific to the target analyte, then measurement precision is improved, but device complexity and ease of operation worsen due to requiring separate analyses and post-measurement chemometric analyses for multiple analytes
Solution Approach 1:
The linear polymer affinity agent is designed with multiple functional groups (carboxyl, hydroxyl, amine) that can bind to various types of analytes simultaneously. This universal binding capability allows a single sensor system to detect multiple mycotoxins (DON, OTA, AFB1) without requiring separate specialized affinity agents for each target, thereby reducing device complexity and analysis requirements while maintaining measurement precision through the polymer's inherent selective hydrogen bonding
Solution Approach 2:
The invention extracts and eliminates the need for post-measurement chemometric analysis by using a linear polymer that produces directly distinguishable spectral signals. Each analyte bound to the polymer generates unique Raman spectral features that can be identified without complex computational processing, thereby removing the cumbersome chemometric analysis step while preserving accurate detection capability
2Reliability
If traditional affinity agents are anchored onto a substrate, then reliability is improved, but productivity worsens due to inability to capture greater amount and number of analytes simultaneously
Solution Approach 1:
The linear polymer affinity agent is designed to be freely movable in the test solution rather than fixed to a substrate. This dynamic mobility allows the polymer to diffuse throughout the solution and interact with multiple analyte molecules, significantly increasing the number and amount of analytes that can be captured in a single measurement. The movable polymer maintains detection reliability through its consistent hydrogen bonding interactions while achieving higher productivity through enhanced analyte accessibility
Solution Approach 2:
The invention merges the functions of multiple traditional affinity agents into a single linear polymer molecule. By incorporating multiple functional groups along the polymer chain, one polymer molecule can simultaneously bind multiple different analytes (mycotoxins), thereby increasing the total analyte capture capacity without sacrificing the reliable specific interactions that each functional group provides
3Measurement precision
If separate analyses are performed for different mycotoxins, then measurement precision is improved, but loss of time worsens due to sequential detection requirements
Solution Approach 1:
The linear polymer affinity agent serves multiple detection functions simultaneously by binding to various mycotoxins (DON, OTA, AFB1) with its multiple functional groups. This multi-functional capability allows all analytes to be detected in a single simultaneous measurement rather than requiring sequential separate analyses, thereby eliminating time loss while preserving the measurement precision achieved through specific hydrogen bonding interactions
Solution Approach 2:
The freely movable linear polymer continuously interacts with analytes in the solution, maintaining active binding capacity throughout the measurement process. This continuous useful action allows simultaneous detection of multiple analytes without the interruptions and idle times associated with sequential analyses, reducing total detection time while maintaining accurate measurement through sustained polymer-analyte interactions
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 enables simple, inexpensive, and efficient simultaneous detection of multiple mycotoxins, providing clear insights into their molecular interactions and binding mechanisms, showcasing the potential for detecting various small molecules without the need for complex analysis.
Implementation Method 1
the polymers may be allowed to freely move in the solution and to bind to the analyte by hydrogen bonding
Implementation Method 2
The polymer-analyte complex may then be applied to a sensing substrate for spectral analysis, e.g., by surface-enhanced Raman scattering (SERS)
Data Source
AI summary
Methods and systems related to a linear polymer affinity agent sensor for SERS are disclosed. Use of the sensor may include mixing a linear polymer affinity agent in a sample solution, subjecting a metal substrate to the sample solution to attach the linear polymer affinity agent to the metal substrate, generating, via Raman Spectroscopy, spectral data representing the at least one linear polymer affinity agent attached to the metal substrate, and determining whether two or more analytes are present in the solution at respective minimum threshold concentrations based on the spectral data.