Particle size
Particle Size
Particle size (/ˈpɑːrtɪkl saɪz/) refers to the diameter of individual particles of any substance, typically in the fields of Materials Science and Chemistry. The term is often used in the study of Sedimentology, Pharmaceutics, and Environmental Science.
Etymology
The term "particle size" is derived from the English words "particle" and "size". "Particle" comes from the Latin "particula", meaning a small part, and "size" comes from the Old French "sise", meaning a set measure or amount.
Definition
Particle size is a notion introduced for comparing dimensions of solid particles (flecks), liquid particles (droplets), or gaseous particles (aerosols). The size of a particle is defined as the smallest measurement that describes the size of a particle. This measurement is typically given in micrometers (µm) or nanometers (nm).
Measurement
Particle size can be measured using various techniques, including Sieve Analysis, Laser Diffraction, and Dynamic Light Scattering. The choice of method depends on the nature of the substance and the precision required.
Related Terms
- Particle Size Distribution: This is the number distribution of particles according to their sizes in a given volume or mass. It is often represented as a cumulative or differential histogram.
- Particle Size Analyzer: This is an analytical technique or device to measure particle size.
- Nanoparticle: This is a particle of matter that is between 1 and 100 nanometers in size.
- Microparticle: This is a particle ranging between 0.1 and 100 µm in size.
- Colloid: This is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance.
See Also
External links
- Medical encyclopedia article on Particle size
- Wikipedia's article - Particle size
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