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X-ray particle sizing

24th April 2019


Testa Analytical Solutions reports that its BI-XDC X-Ray Disc Centrifuge is enabling scientists to make accurate, high resolution particle size distribution measurements, from nanometres to tens of micrometres, without time consuming calibration or absorption correction.

Based on the principle of photosedimentation, the BI-XDC measures the size of particles according to the time the particle takes to sediment in the detector according to Stokes law. Combining centrifugal and gravitational sedimentation in a single instrument the BI-XDC sets a new standard for these well-established methods of particle sizing.

Leveraging a highly reliable orthogonal method, the system is proven to give error free quantitative measurements across a broad range of samples including nanoparticles, minerals, clays, ceramics and metal oxides.

Using the sytem there are no optical corrections and no optical properties to worry about, just a simple mass sensitive response based on x-ray absorption. It features a reproducible digitally controlled disk speed to ensure high performance and accuracy. The scanning x-ray head enables measurements to be made typically in just eight minutes.





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