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A complementary mobile phase approach based on the peak count concept oriented to the full resolution of complex
A Ortín1, J R Torres-Lapasió, M C García-Álvarez-Coque
1Polymer Characterization, S.A., c/ Gustave Eiffel 8, València Parc Tecnològic, 46980 Paterna, Spain.
Optimizing liquid chromatography resolution for complex samples is achieved using complementary mobile phases (CMPs). This new, simpler method ensures all compounds are resolved without complex programming, offering high-quality results efficiently.
Area of Science:
- Analytical Chemistry
- Chromatography
Background:
- Achieving full resolution in liquid chromatography is challenging for complex samples with numerous or similar compounds.
- Single separation conditions often prove insufficient for resolving all components.
Purpose of the Study:
- To optimize compound resolution in reversed-phase liquid chromatography using multiple isocratic mobile phases.
- To develop a simpler, accessible method for selecting complementary mobile phases (CMPs) for complex sample analysis.
Main Methods:
- Employed two or more isocratic mobile phases with complementary resolution behavior (CMPs).
- Utilized a sequential search approach based on the peak count concept to identify optimal CMPs.
- Tested the method using a mixture of 30 probe compounds, varying pH and organic solvent content.
Main Results:
- The new sequential search method provides solutions of comparable quality to the genetic algorithm with local search (LOGA).
- The approach significantly reduces computation time for finding optimal CMPs.
- Demonstrated satisfactory resolution for all compounds in the test mixture.
Conclusions:
- A simplified, sequential search method effectively identifies complementary mobile phases for enhanced liquid chromatography resolution.
- This approach is accessible to non-programmers, offering efficient and high-quality separation of complex samples.
- The peak count concept provides a robust metric for optimizing chromatographic separations.
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