Particle size characterization (particle sizing)

Particle and droplet size are basic features that influence the properties and performance of solids, emulsions and sprays. Conductivity, flexibility, gloss, hardness, stability, strength and taste are some of the properties that can be influenced by particle size. Size and size distributions are important in various areas such as: atmospheric aerosol dispersion, ceramic and alloy properties, catalyst performance, crystal growth, contamination of soil and liquids, wastewater management, medicine and spray effectiveness, paint performance, emulsions stability and so on. Several light scattering and electrical techniques are available in the laboratory of Delft Solids Solutins, as well as more conventional methods as sedimentation and microscopy.

For analysis request and more information, see also the main website of Delft Solids Solutions: www.solids-solutions.com

An easy measurement of the particle size of powders is done with a laserdiffraction instrument. The particle size distributionof the powder is instantly given with this dynamic light scattering method. The dispersion is made by the analysis laboratory of Delft Solids Solutions up to submicron particles.The size distribution of an aerosol, nasal spray or inhaler is measured with phase Doppler analyser. The droplet size will give information for the nozzle droplet size design.
Nano particles are no problem for the photon correlation spectroscopy analysis. The light scattering used in this method gives information on the dispersion.The particle size analysis of emulsions can also be made, either by measuring the particle size distribution with light scattering.

Particle size analysis

Particle size characterization such as dynamic light scattering, electrical senzing zone and microscopy.
particle size analysis of a powder and droplet size of a spray. Techniques as dynamic light scattering and static light scattering such as laserdiffraction and photon correlation spectroscopy are available among others.
particle size and particle or size distribution of a powder is measured. Also spray characterization is done by dynamic light scattering. This gives the droplet size. As a chemical laboratory of Delft Solids Solutions we measure laserdiffraction used for nozzle design and aerosol characterization. The submicron particle size distribution is interesting for nozzle droplet size design.
light scattering such as static and dynamic light scattering or even phase doppler velocimetry and time of fight are all among the measuring possibilities of our laboratory of Delft Solids Solutions.
The measurement of particle size distributions of powders and sprays. Nozzle design can be assisted by techniques as laserdiffraction and phase doppler velocimetry. Submicron particles are measured with photon correlation spectroscopy and time of flight. laser diffraction, photon correlation spectroscopy and light scattering all give a particle size analysis in some cases based on brownian motion. The droplet size is important for the nozzle design of a spray. The particle size of a powder is not measured with doppler effect, this needs dynamic light scattering or static light scattering which gives the particle size distribution with fraunhofer diffraction.
laser diffraction is a dynamic light scattering technique that gives the particle size distribution and droplet size analysis.

Measuring of particle size

Our laboratory of Delft Solids Solutions makes measurements of particle size distributions of powders and characterization of sprays. laser diffraction is widely used for spray nozzle design, special spray adapters are available. particle size distribution analysis is rapid and accurate.
particle size distribution on malvern instruments or use of pids technology with dispersion of submicron samples on the beckman coulter or even sympatec gives a characterization according to the principles of dynamic light scattering. Photon correlation spectroscopy is a static light scattering technique for submicron particle size analysis in low concentration.
The analysis of submicron particle size samples in low concentration. In photon correlation spectroscopy the brownian motion of particles is measured with a multi angle laser giving the diffusion coefficient thus the particle size of the dispersion. The diffusion coefficient of the submicron particles in a powder in dispersion. The nano particle characterization is done with a laser multi angle analysis resulting in the brownian motion. In this manner colloid systems are characterized with quasi elastic light scattering spectroscopy.
Phase doppler velocimetry and the use of doppler effect to measure droplet size and velocity of sprays.

light scattering techniques - laser diffraction - photon correlation spectroscopy - phase doppler velocimetry - electrical techniques - electrical sensing zone - optical techniques - scaning electron microscopy - other particle analyses - gravitational sedimentation - sieve analysis