PHC320H1 Lecture Notes - Lecture 30: Dynamic Light Scattering, Particle-Size Distribution, Centrifugal Force

• School: UTSG
• Department: Pharmaceutical Chemical Engineering and Applied Chemistry
• Course: PHC320H1
• Professor: Shirley Wu

Document Summary

And we have mathematical tools so we know between area and volume, so we can always convert original data to volume/ weighted or weight average diameter, so we get 3 different subscripts, v,w, n(number) Dls can only measure wet sample, since you need a medium, so viscosity and refractive index for medium needs to be reported. Dls there is some other instrument with variable angles, and select which angle is the best. In these distribution curves, usually we can plot these using different ways, these curves we call frequency vs diameter curves, and another one is cumulative frequency vs diameter distribution curve first one is the raw data, Normal distribution function is used to describe normal distribution curve log-normal distribution is used to describe skewed curves. We have equilvalent particle diameter, and number of diameter within this range, from 10-20,