There are a range of particle and surface measurement techniques. The most widely accepted are as follows:
Laser diffraction has become the preferred particle sizing method in many industries. It’s an absolute method which does not require calibration but performance can be validated. Laser diffraction has a wide dynamic range, 0.2 to 2000 microns and gives a volume distribution which is the most useful distribution for chemical engineers. Dry powders, aerosols, liquid suspensions and emulsions can all be measured, often producing a result in less than a minute.
Dynamic light scattering (DLS) is a sensitive technique for measuring the size of molecules and particles in the submicron region. Results are expressed as particle hydrodynamic diameter.
Image analysis. Microscope optics and a CCD camera magnify and capture the image of particles which are counted and their size and shape measured. Systems are capable of high resolution sizing from 0.5µm - 1000µm.
Tensiometers enable the precise characterisation of contact angles and surface tensions providing valuable information on the interactions at a solid-liquid or liquid-liquid interface.
Surface tension can be measured with optical, force and bubble tensiometers. A liquid-liquid phase boundary is referred to as interfacial tension and can be measured with force and optical tensiometers.
Contact angle interaction between a liquid and solid can be attractive or repulsive and can be measured by optical tensiometers.
Surface free energy is surface tension for solids and can be measured via contact angle measurements with a range of liquids.
Product Enquiry Form
Please note, information requests are only applicable to Australia, New Zealand, Papua New Guinea and Fiji.
