Particle Characterization: Light Scattering Methods by Hans Rumpf

By Hans Rumpf

Particle characterization is a vital part in product learn and improvement, manufacture, and qc of particulate fabrics and an immense device within the frontier of sciences, resembling in biotechnology and nanotechnology. This e-book systematically describes one significant department of recent particle characterization expertise - the sunshine scattering equipment. this can be the 1st monograph in particle technology and expertise masking the foundations, instrumentation, facts interpretation, purposes, and most up-to-date experimental improvement in laser diffraction, optical particle counting, photon correlation spectroscopy, and electrophoretic mild scattering. additionally, a precis of all significant particle sizing and different characterization tools, simple information and pattern instruction strategies utilized in particle characterization, in addition to nearly 500 newest references are supplied. The publication is a needs to for commercial clients of sunshine scattering innovations characterizing numerous particulate structures and for undergraduate or graduate scholars who are looking to the way to use gentle scattering to review specific fabrics, in chemical engineering, fabric sciences, actual chemistry and different comparable fields.

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Using standard materials to calibrate the retention time as a function of molecular weight and using a detection scheme in which the signal response is proportional to the effluent mass of polymer, SEC is one of the more popular ways to determine the molecular weight of macromolecules. The application of SEC to particle size characterization is based on the same principle as that employed for polymer chains. It is mainly used for fractionating and sizing submicron colloidal particles. The limitations of the technique arise from particle-packing interaction and loss of sample via PARTICLE CHARACTERIZATION OVERVIEW 19 entrapment of aggregates or larger particles by the packing beads.

16 CHAPTER 1 Microscopic analysis has advantages over other methods in that it can provide information on size, shape, surface texture and some optical properties of individual particles in a broad size range and in great detail [20]. Microscopic analysis has often been the final judge of the size of monodisperse standard reference materials. However, the disadvantages of microscopic methods are also obvious. First, in most cases, they only yield information from the 2-D projected areas of particles.

In the second step, the hologram is again illuminated by a coherent light source and a stationary image of all the particles at their original locations in the volume is created. This 3-D image can be studied and restudied by focusing the viewing plane on particles at different locations and new 2-D images of particles can then be viewed or recorded. The same image analysis tools used in microscopic studies can be used to analyze these holographic images to determine characteristics of the particles.

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Particle Characterization: Light Scattering Methods by Hans Rumpf
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