Presentation at 17th International Symposium on Surfactants in Solution on August 17-22, 2008
A New Method Based on Light Backscattering Signals to Trace Sedimentation and Creaming
A considerable percentage of industrial products are dispersions (emulsions, suspensions, suspoemulsions). In addition to microbiological and chemical stability, physical stabilities manifested in creaming and/or sedimentation processes are also of great importance, both for the R&D and production process. The increasingly complex demands placed on new formulations require fast, reliable and cost-efficient means for analysing equipments.
A new multisample approach using light backscattering signals is presented. It allows for fast measurement of destabilisation and/or demixing phenomena and separation kinetics of up to 8 different samples simultaneously, by monitoring the concentration change in a very small region of interest at the bottom of sample cell.
The paper deals with the measuring principle and the analysis of the measuring signals. The whole time course can be described by a three parametric function. We represent applications regarding classification of dispersions with different stabilities due to different surfactants or emulsifiers as well as checking of destabilisation procedures.
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