Particle size distribution is discussed in three sentences or less: The document discusses particle size distribution and techniques for measuring distribution widths such as laser diffraction and dynamic light scattering. It also notes that results from number-based systems like microscopes provide number distributions while laser diffraction provides volume distributions, but the results can be transformed between number, volume, and surface area distributions. The document is authored by Maryam Kazemi, a PhD student at Shiraz University of Medical Sciences.

1. Particle Size distribution
Maryam kazemi
PhD student of pharmaceutics
Shiraz university of medical sciences

2. Shape of distribution

4. DISTRIBUTION WIDTHS

5. TECHNIQUE DEPENDENCE
• LASER DIFFRACTION
• DYNAMIC LIGHT SCATTERING
• IMAGE ANALYSIS

9. Results from number based systems, such as microsc
opes or image analyzers
 Results from laser diffraction construct their
beginning result as a volume distribution. The
software for many of these systems includes
the ability to transform the results from
num ber to Volume.
an example where a laser diffraction result is transfor
med from volume to both a number and a surface ar
ea based distribution.

10. Transforming results