Particle measurement technology
The term particle measurement refers to measurement methods for the qualification and quantification of “small bodies” ( particles ). These can be of different nature, including dusts and nanoparticles ( soot , aerosols , etc.), elementary particles , viruses and bacteria . Other organic and inorganic substances in the macroscopic range, such as skin flakes or fine crystal splinters , are also treated as "particles" in this context.
Particle measurements are used in almost all areas of the natural sciences ( physics , chemistry , biology ) and in technology and criminology . The type of measurement methodology therefore depends heavily on the type and nature of the particles as well as the question to be answered that preceded the measurement setup.
Particle measurement technology deals with the characterization of disperse systems, e.g. B. suspensions, emulsions, suspoemulsions, powders, aerosols, foams and cells in fermenters. The properties to be characterized go far beyond the particle size and include properties such as B. Charge, polymorphism, shape, color and structure. Limiting particle measurement technology to the measurement of dispersity properties does not do justice to its importance. Rather, there is also the measurement of other product properties that are important for the application and that do not exclusively depend on the dispersity :
- Optical properties
- Electrical Properties
- Space filling
- Bulk behavior
- Agglomeration behavior
- Flow behavior
- Rheological behavior
- Filtration behavior
- Wear behavior
- Surface reactions
and many others. By far the most important sub-grouping in the field of particle measurement technology is nevertheless the particle size analysis .
DECHEMA working group
The DECHEMA (Society for Chemical Engineering and Biotechnology. V.) has a working group that deals with the topic of particle measurement technology. Her main areas of work include:
- Development of high-precision laboratory methods, sampling strategies
- increasing use of online methods for monitoring and controlling production processes
- Coupling of measured variables with process models
- Aerosol measurement technology, e.g. B. for emission measurements, product characterization
- occupational medicine and toxicological examinations
- Optimization or new development of reference methods, especially for submicrometer / nanoparticles
- Richard G. Holdich: Fundamentals of Particle Technology . Midland Information Technology and Publishing, ISBN 0-9543881-0-0 .
- WF Hess: Particle Measurement Technology . Wiley-VCH, 2005, ISBN 3-527-30311-1 .
- Particle measurement technology on Processnet.org