Characterization of colloidal dispersions by Dynamic and Static Light Scattering (DLS and SLS) and Light Diffraction
For determination of size distribution in the 1-1000 nm range, we offer a Photon Correlation Spectrometer (PCS) for dynamic (DLS) and static (SLS) light scattering measurements for angles in the 20-140º range and capacity of suppressing multiple scattering thanks to the 3D-cross correlation technology (down to 5% of transmission for sub-micrometer sample thickness). The instrument is equipped with a He-Ne laser and its software allows the estimation of particle size by Cumulant or CONTIN analysis. It is also possible to measure non-ergodic samples with a rotating sample holder.
For determination of size distribution in the 100-10,000 nm range we offer a Mastersizer 2000 instrument that measures by means of laser diffraction the size and distribution of particles or droplets in suspension. It is equipped with a liquid dispersing unit for small volume (Hydro 2000G) to measure emulsions, dispersions, etc. and a solid dispersion unit (Scirocco) to analyse dried powders. It is equipped with a software (windows operated) for the data processing to obtain the characteristic size (droplet, particle) and its distribution.
Customer benefits
- Specialized in colloidal samples
- ISO9001 certification for standard quality control system
- Highly qualified and continuously trained staff
- Adapted to customers’ needs
The services provided by the unit are very relevant for product formulation and quality control. Applications include determination of the droplet/particle diameter for emulsions, suspensions and solid samples (powder) in the range of 100 nm – 2000 mm. The results are expressed in standard percentiles D(v,0.1), D(v0.5), D(v0.9), mean volume diameter (D[4,3]), mean surface diameter (Sauter mean diameter, D[3,2]), specific surface area (SSA), etc.
Target customer
Public research organisations, academia and industry in the pharmaceutical, chemical, food and cosmetic sectors.
Additional information
More information can be found at https://www2.iqac.csic.es/qci/
