What are the functions and requirements of particle size measurement medium?

Particle size measurement usually involves placing the sample in a certain liquid or gas to form a uniform suspension with a certain particle concentration. When this uniform suspension passes through the measurement window, the particle size can be measured. The medium refers to the liquid or gas used here, which is the substance that plays a mediating role.

1. The role of the medium

(1) Media role: It serves as a carrier for uniform dispersion of the sample;

(2) Dispersion role: It promotes the separation of "agglomerated" particles into monomer particles.

2. The medium for particle size measurement usually has the following requirements:

(1) Pure;

(2) No chemical reaction with particles;

(3) Good affinity with particles. Good wetting effect on the particle surface;

(4) Make the particles have a proper sedimentation state.