Polysorbate Detection in Biopharmaceuticals via ELSD
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Solution Overview
Problem
Current analytical methods for detecting polysorbate 80 (PS80) in pharmaceutical products lack specificity, sensitivity, accuracy, precision, transferability, and the ability to monitor intact and degraded PS80 and related subspecies, especially in protein-containing biopharmaceutical formulations, and do not meet the standards of traditional UV-Visible HPLC methods in terms of time and cost.
Innovation Solution
A method involving protein precipitation with organic solvents, followed by centrifugation and chromatography using an immobilized cyano group column, and detection with a chromophore-lacking detector to separate and identify polysorbates, allowing for the quantification of intact and degraded PS80 and its subspecies in protein-containing samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional UV-Visible HPLC methods are used for polysorbate detection, then the method is well-established and transferable, but it lacks specificity for intact vs degraded polysorbate and requires complex derivatization
Solution Approach 1:
The patent extracts and separates intact polysorbate from degraded products using a two-step chromatographic process (hydrophilic interaction chromatography followed by reverse-phase chromatography), eliminating the need for complex derivatization steps while maintaining method transferability
Solution Approach 2:
The patent introduces an intermediary detection system using evaporative light scattering detection (ELSD) that mediates between the chromatographic separation and final quantification, providing specificity for intact versus degraded polysorbate without requiring derivatization
2Quantity of substance
If conventional chromatography methods are used, then the equipment is widely available, but the sensitivity is insufficient to detect polysorbate at ≤ 20 ppm levels
Solution Approach 1:
The patent changes the detection parameter from UV-Visible absorption to evaporative light scattering, which enables detection at ≤ 20 ppm levels while maintaining quantification accuracy through calibration with intact polysorbate standards
3Reliability
If polysorbate detection methods are developed with high specificity for intact polysorbate, then degraded products can be monitored, but the method becomes time-consuming and costly compared to traditional HPLC
Solution Approach 1:
The patent segments the detection process into two chromatographic steps with ELSD detection, where the first step separates intact polysorbate from degraded products and the second step provides confirmatory separation, achieving high specificity while maintaining reasonable analysis time through optimized gradients
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 accurate and sensitive detection of polysorbates, achieving specificity, precision, and linearity, while being compatible with traditional HPLC methods in terms of time and cost, and is applicable to protein-containing biopharmaceutical formulations, enabling the monitoring of polysorbate integrity and stability.
Implementation Method 1
precipitating the protein by exposing said sample to an organic protic polar solvent or an organic aprotic polar
Implementation Method 2
separating the protein from the precipitated sample by centrifuging the precipitated sample to pellet the protein and obtaining a liquid supernatant
Implementation Method 3
separating the polysorbates by subjecting the supernatant to chromatography, wherein the chromatography comprises applying the supernatant to a stationary phase column comprising an immobilised cyano group
Data Source
AI summary
The present invention relates to provision of a method for detection of polysorbate in pharmaceutical products.