Molecularly Imprinted Polymers for Separating Oxidized Triglycerides
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Solution Overview
Problem
Current methods for separating oxidized triglycerides from frying oil, such as silica gel column chromatography, fail to individually isolate the most toxic components, resulting in mixed polar substances and incomplete separation.
Innovation Solution
The method employs molecular imprinting technology to synthesize surface molecularly imprinted polymers (SMIPs) specifically matching the structure of epoxy, hydroxyl, and aldehyde oxidized triglycerides, which are then used in a chromatographic process to accurately separate these compounds from frying oil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If silica gel column chromatography is used to separate polar substances, then separation based on polarity difference is achieved, but only mixed polar components can be obtained and ox-TG compounds cannot be individually separated
Solution Approach 1:
The patent segments the separation process into two distinct stages: first using silica gel column chromatography to separate polar from non-polar components, then using molecularly imprinted polymers to further segment and individually separate different ox-TG compounds (epoxy, hydroxyl, and aldehyde types) from the mixed polar components. This multi-stage segmentation approach resolves the contradiction by achieving both broad separation and specific identification.
Solution Approach 2:
The patent introduces molecularly imprinted polymers as an intermediary substance that specifically recognizes and binds to different ox-TG compounds. These polymers act as mediators between the mixed polar components and the detection system, enabling individual identification of ox-TG compounds that cannot be directly separated by conventional chromatography alone.
2Ease of operation
If conventional chromatography methods are used, then the separation process is simple, but the specificity and affinity for individual ox-TG compounds are insufficient
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing molecularly imprinted polymers with specific recognition sites for different ox-TG compounds before the separation process. These pre-prepared polymers are then directly used in the chromatography system, combining the simplicity of conventional operation with high reliability through their specific recognition capabilities.
3Measurement precision
If molecular imprinting technology is used to synthesize SMIPs, then specific ox-TG can be separated with high specificity and affinity, but the process complexity increases
Solution Approach 1:
The patent extracts the complex molecular imprinting process into a separate, pre-prepared stage, producing ready-to-use SMIPs. This extraction allows the main separation and identification process to remain relatively simple while achieving high precision through the pre-engineered specificity of the imprinted polymers.
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 the precise separation and identification of oxidized triglycerides with high specificity, stability, and affinity, achieving effective separation of epoxy, hydroxyl, and aldehyde ox-TG, improving the safety and quality of frying oil.
Implementation Method 1
a polymer completely matched with the ox-TG template molecule in action site and spatial configuration is synthesized, and the specific ox-TG can be separated by using the SMIPs
Implementation Method 2
a chromatographic column: loading the OXTG-SMIPs obtained in step (1) into a chromatographic column; (c) separation with the chromatographic column: adding the frying oil to the chromatographic column, and adding an eluting agent for elution so as to separate the oxidized triglyceride from the frying oil
Implementation Method 3
adding an eluting agent for elution so as to separate the oxidized triglyceride from the frying oil; sequentially adding eluting agents to the chromatographic column for eluting the oxidized triglyceride
Data Source
AI summary
The present disclosure discloses a method for accurately separating and identifying an oxidized triglyceride in frying oil, and belongs to the technical field of detection. In the present disclosure, the structure of the oxidized triglyceride (ox-TG) in the frying oil is identified by mass spectrometry first. It is found that after frying is conducted for 24 h, the ox-TG mainly includes epoxy ox-TG, hydroxyl ox-TG, and aldehyde ox-TG. Thus, the three types of ox-TG are selected as a template molecule to synthesize a surface molecularly imprinted polymer (SMIPs). Then, a polymer completely matched with the ox-TG template molecule in action site and spatial configuration is synthesized, and the specific ox-TG can be separated by using the SMIPs. According to the present disclosure, OXTG-SMIPs prepared by a molecular imprinting technology has good specificity, stability, and affinity, and accurate separation of the ox-TG in the frying oil can be achieved.