SERS Allergen Detection via Magnetic Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing allergen detection methods, such as ELISA, are slow and limited in sample size, making it challenging to efficiently detect and quantify allergens in food products, especially for large-scale manufacturing where multiple allergens need to be tested simultaneously across various batches and sources.
Innovation Solution
The use of surface-enhanced Raman scattering (SERS) combined with magnetic particles and SERS tags, where antibodies are used to bind to antigens, allowing for the separation and analysis of allergens using Raman spectroscopy, enabling simultaneous detection and quantification of multiple allergens in larger sample volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ELISA is used for allergen detection, then detection accuracy is achieved, but testing speed is slow and sample size is limited
Solution Approach 1:
The patent combines magnetic separation technology with Raman spectroscopy detection to create a hybrid system. Magnetic particles enable rapid separation and concentration of allergens from large sample volumes, while SERS tags provide highly sensitive detection. This merging of separation and detection methods resolves the contradiction by enabling both high throughput and high sensitivity simultaneously.
Solution Approach 2:
The patent introduces SERS tags as intermediary markers that bind to allergens through antibodies. These tags act as signal amplifiers, converting the presence of trace allergens into strong Raman signals. This intermediary approach enables detection of allergens at very low concentrations while maintaining rapid testing speed, thus resolving the accuracy-throughput tradeoff.
2Productivity
If multiple allergens are tested simultaneously, then detection efficiency improves, but test complexity increases
Solution Approach 1:
The patent assigns different Raman spectral characteristics to different SERS tags, allowing simultaneous detection of multiple allergens through spectral differentiation. Each allergen-antibody-SERS tag complex produces a unique spectral fingerprint, enabling multiplexed detection without cross-interference. This local quality differentiation simplifies the analysis of complex multi-allergen samples.
Solution Approach 2:
The patent segments the detection process by using magnetic particles for separation and SERS tags for detection. This segmentation allows parallel processing of multiple allergens in a single sample, as different antibody-SERS tag combinations can simultaneously target different allergens without interfering with each other, thereby improving efficiency while managing complexity.
3Measurement precision
If larger sample volumes are analyzed, then detection sensitivity improves, but analysis time increases
Solution Approach 1:
The patent performs preliminary magnetic separation and concentration of allergens from large sample volumes before Raman spectroscopy analysis. By pre-concentrating the allergens using magnetic particles, the system achieves high detection sensitivity without requiring time-consuming analysis of the entire large volume sample. This preliminary action resolves the contradiction by decoupling sample volume from analysis time.
Solution Approach 2:
The patent replaces traditional mechanical separation methods with magnetic field-based separation. This substitution enables rapid concentration of allergens from large volumes without the time-consuming centrifugation or filtration steps required by conventional methods, thus maintaining high sensitivity while minimizing analysis time.
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 method provides rapid and sensitive detection of allergens, allowing for the analysis of larger sample volumes and simultaneous detection of multiple allergens, overcoming the limitations of traditional ELISA techniques by enhancing the sensitivity and throughput of allergen testing.
Implementation Method 1
a magnetic field can be applied to the sample. The magnetic field can attract each magnetic particle bound to an antigen via an antibody
Implementation Method 2
surface-enhanced Raman scattering (SERS) tags complexed with antibodies can be added to the sample
Data Source
AI summary
A technique can be used to detect and/or quantify allergens in foods. In some examples, the technique involves adding magnetic particles that carry antibodies and surface-enhanced Raman scattering (SERS) tags complexed with antibodies to the sample. The antibodies associated with both the magnetic particles and the SERS tags can be selected to bind to one or more antigens that correspond to allergens being investigated. After adding magnetic particles to the sample, a magnetic field can be applied to the sample to concentrate antigens in the sample, including any SERS tags bound to the antigens. The concentrated sample can be analyzed with SERS and a concentration of the mammalian allergen determined based on the SERS response.