Parallel ODS Chromatography for Inosinic and Guanylic Acid Separation
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Solution Overview
Problem
Existing liquid chromatography methods face challenges in separating peaks corresponding to inosinic acid and guanylic acid due to their similar retention times, necessitating separate analysis systems which incur space and installation issues.
Innovation Solution
An analytical method utilizing parallel analysis steps with non-derivatized and derivatized samples on separate ODS columns, where the first column is at least 185 mm long, achieving a separation degree of 1.5 or more for inosinic acid and guanylic acid peaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single column is used to analyze both ATP-related substances and histamine/amino acids, then device complexity and installation space are reduced, but peak separation between inosinic acid and guanylic acid deteriorates
Solution Approach 1:
The analysis is divided into two separate analysis steps: a first analysis step for ATP-related substances using a non-derivatized sample, and a second analysis step for histamine/amino acids using a derivatized sample. This segmentation allows each analysis to be optimized independently while using the same column, resolving the contradiction between device simplicity and separation precision.
Solution Approach 2:
The invention changes the parameter of derivatization between the two analysis steps. The second sample is derivatized before analysis while the first sample is not, which alters the retention characteristics of the components. This parameter change enables both types of analysis to be performed on the same column with adequate peak separation.
2Manufacturing precision
If separate analysis devices are prepared for ATP-related substances and histamine/amino acids, then analysis precision is improved, but installation space and device complexity increase
Solution Approach 1:
A single liquid chromatograph is designed to perform multiple functions by sequentially executing different analysis steps. The same column and detector are used for both ATP-related substance analysis and histamine/amino acid analysis, eliminating the need for separate devices while maintaining analysis precision through optimized analysis conditions for each step.
Solution Approach 2:
The system dynamically switches between different analysis modes by changing sample preparation (derivatization vs. non-derivatization) and analysis conditions. This dynamic adaptability allows one device to replace multiple specialized devices, reducing installation space while preserving analysis precision.
3Manufacturing precision
If column length is increased to separate inosinic acid and guanylic acid peaks, then separation degree is improved, but analysis time increases
Solution Approach 1:
Instead of increasing column length, the invention changes the parameter of derivatization to alter retention characteristics. This approach achieves peak separation without the time penalty associated with longer columns, as the derivatized and non-derivatized samples have different retention behaviors that facilitate separation on a standard-length column.
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
The method effectively separates peaks corresponding to inosinic acid and guanylic acid, allowing simultaneous analysis of both samples without additional columns, enhancing efficiency and reducing space requirements.
Implementation Method 1
a first analysis step of introducing a non-derivatized first sample into a first column together with a first mobile phase, and analyzing components contained in the first sample, and a second analysis step of introducing a derivatized second sample into a second column together with a second mobile phase, and analyzing components contained in the second sample, using the first column and the second column each constituted by an ODS column
Data Source
AI summary
An analytical method for performing, in parallel, a first analysis step of introducing a non-derivatized first sample 132 into a first column 44 together with a first mobile phase 54, and analyzing components contained in the first sample 132; and a second analysis step of introducing a derivatized second sample 137 into the second column 84 together with a second mobile phase 94, and analyzing components contained in the second sample 137, wherein the first sample 132 contains inosinic acid and guanylic acid, and in the first analysis step, by separating components contained in the first sample 132 using the first column 44 having a length of 185 mm or more, a chromatogram is obtained in which peaks corresponding to inosinic acid and guanylic acid are separated with a separation degree of 1.5 or more.