Question

What are the differences between laser diffraction and dynamic light scattering?

Answer 1

The two techniques are basically particle measurement techniques.

But the differences are as follows:=

In Dynamic light scattering(DIS) particle motion is determined from measured fluctuations in the intensity of the scattered light whereas in Laser diffraction(LD) particle size is determined from the measured variation in the intensity of the scattered light as a function of scattering angle.

In DIS particle motion is very much important whereas in LD it is not important that particle should be moving.

DIS measurements can be made on microliters of sample suspension but in LD minimum volume is in milliliters.

DIS is much more suitable for sample systems which generates very week scattering.

LD is capable of measuring powder, paste, and gels.