HPLC Method for Desmosine Quantification in Elastin
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Solution Overview
Problem
Current methods for isolating and measuring desmosine and isodesmosine in elastin are not scientifically rigorous or accurate, which is crucial for verifying the effectiveness of skin molecule technologies that utilize elastin hydrolysate.
Innovation Solution
A method involving hydrolysis of elastin followed by separation using high-performance liquid chromatography (HPLC) with a mobile phase gradient comprising methane sulfonic acid and sodium hexanesulfonate, and formic acid in Acetonitrile, allows for the accurate quantification of desmosine and isodesmosine by measuring eluents at 275 nanometers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current isolation and measurement methods are used, then the process is simpler, but the measurement precision and scientific rigor are insufficient
Solution Approach 1:
The method segments the complex elastin protein into its constituent amino acids through hydrolysis, then further separates the specific target compounds (desmosine and isodesmosine) from the hydrolyzate using HPLC. This segmentation allows for precise quantification of individual components that would be difficult to measure in the intact protein matrix.
Solution Approach 2:
The patent introduces an intermediary HPLC separation system with specifically designed mobile phases (containing MSA, HSA, formic acid, and acetonitrile) that acts as a mediator between the complex elastin hydrolyzate and the detection system. This intermediary step enables selective separation and accurate measurement of desmosine and isodesmosine.
2Reliability
If a simple measurement approach is used, then the ease of operation is higher, but the reliability and accuracy of verification are reduced
Solution Approach 1:
The method performs preliminary hydrolysis of elastin and pre-separation of the hydrolyzate before the actual measurement step. This preliminary action prepares the sample in a form that enables reliable and accurate quantification of desmosine and isodesmosine, ensuring verification reliability before the final measurement occurs.
Solution Approach 2:
The patent employs parameter changes in the mobile phase composition (gradual changes in solvent ratios, pH, and ionic strength) during HPLC separation to optimize the resolution and detection of desmosine and isodesmosine. These controlled parameter changes enhance measurement reliability while maintaining a systematic operational approach.
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 a validated and accurate means to quantify desmosine and isodesmosine, enabling precise analysis and research in elastin hydrolysates, enhancing the verification of skin conditioners and their anti-aging effects.
Implementation Method 1
separating the desmosine and isodesmosine in the hydrolyzed sample of elastin within a high-performance liquid chromatography (HPLC) column
Implementation Method 2
hydrolyzing a sample of elastin
Implementation Method 3
measuring eluents at 275 nanometers
Data Source
AI summary
A method of isolating desmosine and isodesmosine in elastin includes hydrolyzing a sample of elastin and separating the desmosine and isodesmosine within a high-performance liquid chromatography (HPLC) column. A mobile phase gradient includes a first solvent solution of MSA (methane sulfonic acid) and HSA (sodium hexanesulfonate) and a second solvent solution of formic acid in Acetonitrile. The desmosine and isodesmosine may be measured as eluents based upon a HPLC chromatogram.