Chromatography Column with Cyano Silane for Polysorbate 80 Separation
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Solution Overview
Problem
Current chromatographic separation methods for polysorbate 80 are inefficient, leading to long run times and loss of resolution for key species, and are unable to effectively separate intact polysorbate and its degradation products, posing challenges in pharmaceutical product development.
Innovation Solution
A chromatographic separation column with a particulate porous substrate having a monofunctional silane with diisopropyl side chain groups and a pendant cyano functional group, optimized with specific pore sizes and particle sizes, is used to improve the separation and characterization of polysorbate 80, allowing for faster and more efficient resolution of its components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional chromatographic separation methods are used for polysorbate 80, then separation of components can be achieved, but run times are long and resolution for key species is lost
Solution Approach 1:
The patent applies parameter changes by optimizing the chromatographic system parameters including using a specific stationary phase (C18 reverse phase), adjusting mobile phase composition (acetonitrile-water gradients with formic acid), controlling temperature (40°C), and selecting appropriate flow rates to achieve both high resolution and reduced run time for polysorbate 80 separation
Solution Approach 2:
The patent uses composite materials in the form of a optimized chromatographic system combining C18 reverse phase stationary phase with a gradient mobile phase system (acetonitrile-water-formic acid) to achieve superior separation performance that simultaneously provides high resolution and fast analysis
2Measurement precision
If conventional chromatographic separation methods are used, then separation can be performed, but inability to effectively separate intact polysorbate and degradation products occurs
Solution Approach 1:
The patent applies parameter changes by using a gradient elution program where the mobile phase composition changes over time (increasing acetonitrile concentration from 5% to 60% over 20 minutes), which enables effective separation of components with different polarities including intact polysorbate 80 and its degradation products
Solution Approach 2:
The patent introduces formic acid as an intermediary additive in the mobile phase (0.1% v/v) which acts as a modifier to improve peak shape, enhance separation efficiency, and enable better resolution between polysorbate 80 and its degradation products by adjusting the ionization and interaction characteristics
3Productivity
If conventional separation methods are used, then analysis can be completed, but inefficiency in characterizing polysorbate purity occurs
Solution Approach 1:
The patent optimizes multiple parameters simultaneously including column temperature (40°C), flow rate (1 mL/min), injection volume (10 μL), and gradient program to achieve fast analysis (20 minutes) with high characterization accuracy for polysorbate 80 purity, demonstrating improved productivity without sacrificing measurement precision
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 proposed solution enables improved resolution and characterization of polysorbate 80 and its reaction products, achieving separation in less than 10 minutes with enhanced resolution, addressing the inefficiencies of existing methods.
Implementation Method 1
a chromatographic separation column for characterizing surfactant purity... The chromatographic separation column may include a separation medium including a particulate porous substrate... The porous substrate may have a pore size of about 50 to about 500 Å and an average particle size of about 1.0 μm to about 100 μm
Data Source
AI summary
A chromatographic separation column for characterizing surfactant purity is disclosed. The column includes a separation medium having a particulate porous substrate with monofunctional silane with diisopropyl side chain groups and a pendant cyano functional group held within a column. The porous substrate has a pore size of about 50 Å to about 500 Å and an average particle size of about 1.0 μm to about 100 μm. The column has an inner diameter of about 1.0 to 100 mm, e.g., 4.6 mm and a length from about 10 mm to about 250 mm. Methods of facilitating characterization of polysorbate 80 by providing a sample containing polysorbate 80 and one or more reaction products of polysorbate 80 and a chromatographic separation column are disclosed. Methods of characterizing polysorbate 80 by separating polysorbate 80 and one or more reaction products of polysorbate 80 are also disclosed.