Membrane Particle Counting,



Membrane Particle Counting particle size distribution from microscopic counting of samples on nitrocellulose and gold coated polycarbonate membranes
Morphological parameters Membrane Particle Counting, Elongation, Rectangularity, Fibrosity

Morphological parameters output:

  • Length
  • Width
  • Area
  • Elongation
  • Perimeter
  • Rectangularity
  • Fibrosity
  • D50 and D90 values


        • Particle size distribution from 1 µm up to 47 mm with shape and color  information
        • Sample volume from 100µl up to 10,000 ml
        • Particles are available for further chemical analysis
        • rap.ID works in compliance with the procedures outlined in USP <788> Method 2, ISO 16232, ISO 4407:2002, ISO 8873-1, SAE 4059, IEST-STD-CC1246D for microscopic counting


How it works

In static imaging analysis the image microscopic image of the particle is binarized into background and particle by one or two thresholds. It is necessary that the particles shows a difference in contrast to the background. In the binarized image the 2 dimensional representation of the particle is measured by algorithms and the particles size and shape information is determined. Depending on the filters

material different algorithms are chosen for the binarization and illumination. At rap.ID we use the Single Particle Explorer for this analysis on all kinds of samples such as Polyester filter disks, Cellulose Nitrate and gold coated polycarbonate core pore membrane filters such as the patented filtr.AID. Partilce overlapping single fields are stitched together to single fibers.

Particle stitching Particle stitching combines fibers and large particles overlapping the boundaries of a single field of view.