Keywords
Citation
(2002), "Particle sizer combines high sensitivity with high concentration capability", Pigment & Resin Technology, Vol. 31 No. 1. https://doi.org/10.1108/prt.2002.12931aad.010
Publisher
:Emerald Group Publishing Limited
Copyright © 2002, MCB UP Limited
Particle sizer combines high sensitivity with high concentration capability
Particle sizer combines high sensitivity with high concentration capability
Keywords: Malvern Instruments Ltd, Instruments, Particles
The new Malvern HPPS (High Performance Particle Sizer) is described as a compact, robust and versatile instrument that covers an application range currently requiring three conventional dynamic light scattering systems, and is thought to be the first single instrument to deliver particle size measurement at high sensitivity and high concentration over a wide size range (Plate 6).
Plate 6
The new Malvern HPPS (High Performance Particle Sizer) Instrument
Applications are said to include the measurement of sub-nanometer size particles as small as 0.6nm, and molecules in solution (including highly absorbing samples) through to the analysis of particles up to 6 microns. According to Malvern, coupled with the ability to measure with no or minimal dilution, this makes the Malvern HPPS a flexible analytical tool for particle size measurement across an unmatched range of concentrations and sizes. It is believed to be especially suited to the measurement of colloidal systems, and proteins and macromolecules in solution, as well as more traditional applications in the chemical industry.
The Malvern HPPS incorporates patented technology within its Non Invasive Back Scatter (NIBS&) optics. This novel arrangement of optics reportedly maximises the detection of scattered light while maintaining signal quality, to provide the exceptional sensitivity required for measuring molecules smaller than 1000Da.
Measurement over an extended concentration range using backscatter optics is achieved through the automated positioning of the measurement cell, which ensures that the optimum setting is always achieved. This is close to the centre of the cell for dilute samples in order to maximise sample volume, and near the cell wall for more concentrated samples to minimise the distance that the light has to travel through the sample.
Instrument set-up is said to require little operator intervention and the use of Standard Operating Procedures (S0Ps) means that measurements are consistent and reliable. Live count rates and correlation displays allow data assessment while the measurement takes place.
Details available from: Malvern Instruments Ltd
Tel: +44 (0) 1684 892456; Fax: +44 (0) 1684 892789; E-mail: diptil@malvern.co.uk