Liquid Chromatography with Charged Aerosol Detection
Method Introduction
Liquid chromatography with charged aerosol detection (LC-CAD) analysis is a powerful polysorbate quantification and profiling technique. After a separation step via high-performance liquid chromatography (HPLC), the column eluent is nebulized by a nitrogen flow; the mobile phase evaporates with other volatile components. In the case of CAD, a secondary nitrogen stream subsequently positively charges the analyte particles. The final detection of these dried particles, all nonvolatile, takes place using light scattering (photomultiplier) or level of electrical charge (electrometer) for CAD, respectively.
Applications
LC-CAD, in combination with a product-specific sample preparation protocol to remove protein, is Coriolis Pharma’s workhorse for polysorbate quantification. Depending on the LC protocol, the main subclasses of polysorbate are resolved, and degradation kinetics can be followed straightforwardly.
Coriolis performs liquid chromatography coupled mass spectrometry (LC-MS) analysis for a more in-depth polysorbate degradation analysis.
Besides surfactant characterization, CAD analysis finds application for excipient quantification in general.
Quality and Biosafety Level
We provide all our analytical services with the highest quality standards. Experienced scientists carry out each project, and a scientific reviewer comprehensively checks every report or data presentation.
We offer this technology with the following quality and biosafety levels:
Up to GMP Level
This method is available under GMP in dedicated labs with qualified equipment and full QA involvement.
Up to biosafety level 2
This method can be applied to nucleic acids, viruses, cells, viral vectors, including lentiviruses and more.
Analytical Method Development, Qualification and Validation
For common sample types, we can often apply standardized methods with little setup effort. However, when needed, our experienced analytical experts create or optimize custom methods tailored to your active pharmaceutical ingredient, product type and development phase.
Talk to Our Experts or Request a Quote
Our expert team is ready to answer your questions and guide you to the services best suited to your program’s modality, stage and challenge. If your needs are well-defined, we’ll begin the quotation process.