Descriptions of our particle characterisation instrumentation are given below, including specifications and typical applications.
Links to external resources can be found under the 'Resources' tab on the right.
Malvern Mastersizer 3000 PSA
Our Mastersizer system is the latest instrument from Malvern that allows particle size distribution to be measured via laser diffraction. A laser is passed through a dispersed particulate sample and the intensity of light scattered at different angles recorded. This diffraction pattern is correlated with modelled size distributions.
Our current capabilities are for wet dispersion only, in either water or IPA. The system has a measurement range of 0.01μm - 2mm when using wet dispersion.
Particle size distribution has a direct effect on various material properties, such as:
- Reactivity or dissolution rate
- Stability in suspension
- Efficiency of delivery
|Particle size range||0.01 μm - 2mm (for wet dispersion)||Detection systems||
Red light - forward, side & back scattering
Blue light - wide angle forward & back scattering
|Accuracy||Better than 1%||Dispersion||Wet (water or IPA)|
Better than 0.5% variation
|Measurement principle||Mie & Fraunhofer scattering|
|Reproducibility||Better than 1% variation|
Coulter LS130 PSA
Our Coulter LS130 system allows particle size measurements in the range of 0.1 - 900 microns via laser diffraction.
|Particle size range||0.1 - 900 microns|
|Repeatability||<1% around mean size|
Micromeritics AccuPyc II 1340
The Micromeritics helium gas displacement pycnometer allows the non destruction measurement of volume and density of powder and solid materials. An inert gas (helium) is used as a displacement medium. Since the sample is sealed a compartment of known volume, when the purge gas is admitted and then expanded into a second internal volume, the pressure before and after expansion can be measured and used to determine sample volume.
Absolute (or true) density, i.e. the density obtained where the volume measured excludes pores and voids between particles, is determined using helium pycnometry.
- Density determination
- Volume determination
|Precision||+/- 0.01% (typical) +/- 0.02% (guaranteed)||Sample cell size||1cm3 or 0.1cm3 available|
|Accuracy||Within 0.03% reading, plus 0.03% of sample capacity||Temperature||Not controlled|
|Gas||Research grade helium|