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Resonant mass measurement is a technique used in an innovative way by Archimedes to detect and count sub visible and submicron particles in a sample, and to measure their size and mass and distributions of size and mass. At the heart of Archimedes is a MEMS (micro Electro-Mechanical Systems) sensor, containing a resonating cantilever with a microfluidic channel embedded in its surface. When a particle of between 50nm - 5µm flows through the fluidic channel, it alters the resonating frequency of the cantilever which indicates the buoyant mass, and also the dry mass and size of the particle.
The sensor is also able to provide information on sample concentration, viscosity, density, and volume, and can detect and measure both negatively and positively buoyant particles within a sample. The detection of positively buoyant particles is extremely useful, for example, to distinguish between protein aggregates and contaminating silicone oil droplets in a biopharmaceutical formulation.
The use of resonant mass measurement by the Archimedes offers the following advantages:
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Ultra-Fine (nano) bubbles have garnered increasing interest over the last few years as they open up the potential for improvements in a variety of applications from cleaning to agriculture. However they are still somewhat a mystery with respect to th...
The characterization of subvisible particles is highly relevant for the development of biopharmaceuticals to ensure quality and safety of a therapy. The expectations by the authorities are increasing, which makes it necessary to include analytical me...
This application note provides an example of how Archimedes can be used to detect and quantify the formation of protein sub-visible particles and the introduction of silicone oil droplets, in response to shear stress.
Resonant Mass Measurement technology covers a key size range of 200nm to 5µm for protein aggregation measurement. It requires less than 100µL of sample to give quantitative information on aggregate mass and count
An introduction to Archimedes, the technique of resonant mass measurement, and how this technology is vital in understanding and monitoring early aggregation events in your biopharmaceutical formulation
(Webinar - Recorded)
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