Two zeta potential options and a new phase analysis light scattering technique are features of the Brookhaven 90Plus particle size distribution analyser
Comprehensive characterisation of particles in virtually any liquid medium is simple and rapid with the Brookhaven 90Plus particle size distribution analyser.
Optional facilities - which can be added later if preferred - include two methods of determining zeta potential, classical electrophoretic light scattering, and the new phase analysis light scattering (PALS) technique.
The 90Plus uses dynamic light scattering to determine submicron size distributions based on the particles' diffusion behaviour with a choice of two scattering angles as standard.
Data are processed by Brookhaven's 9000AT digital correlator, built into the 90Plus, using Windows based software to give results in a variety of easily exportable formats.
Zeta potentials of particles up to about 50µm can be determined under a variety of conditions, leading to an enhanced understanding of the stabilisation and surface chemistry of fine particle dispersions.
Whether for particle size or zeta potential determination, the 90Plus has many applications including ceramics, pigments and polymer dispersions.
The ZetaPals zeta potential option is especially useful for 'difficult' samples - for example, those with low mobility due to inherently low zeta potential or due to the use of high viscosity or low polarity (non-aqueous) media.
A 35mW laser is standard and an even higher powered, shorter wavelength laser and/or a high sensitivity detector are options for extremely small or weakly scattering particles.
