- Number and Weight Distribution explains particle size analysis based on count and mass of particles.
- Number and Weight Distribution is key in micromeritics for drug formulation and quality control.
Number Distribution
- Based on counting the number of particles in each size range.
- Sensitive to smaller particles.
- Determined by methods like microscopy or Coulter counter.
Weight or Volume Distribution
- Based on mass or volume of particles in each size class.
- Sensitive to larger particles.
- Commonly obtained using laser diffraction or sedimentation techniques.
Key Differences
| Characteristic | Number Distribution | Weight (Volume) Distribution |
| Emphasizes | Fine particles | Coarse particles |
| Methods | Microscopy, Coulter counter | Laser diffraction, sedimentation |
| Relevant to | Surface-related processes | Mass-based behaviors |
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