Light-scattering instrumentation

Figure 10.9 Light-scattering photometers, (a) Schematic top view showing movable photodetector. (Reprinted from Ref. 2, p. 176.) (b) Cutaway photograph of commercial light-scattering instrument, the Brice-Phoenix Universal Scattering Photometer. (Photo courtesy of the Virtis Co., Gardiner, New York.)...

It is shown that while solute concentration data can be used to estimate the kinetic growth parameters, information about the CSD is necessary to evaluate the nucleation parameters. The fraction of light obscured by an illuminated sample of crystals provides a measure of the second moment of the CSD. Numerical and experimental studies demonstrate that all of the kinetic parameters can be identified by using the obscuration measurement along with the concentration measurement. It is also shown that characterization of the crystal shape is very important when evaluating CSD information from light scattering instruments. 

Chastek TQ, Beers KL, Amis EJ (2007) Miniaturized dynamic light scattering instrumentation for use in microfluidic applications. Rev Sci Instrum 78 072201... 

Light scattering Modem laser light scattering instruments are very advanced devices for particle size distribution analyses. The laser light is scattered by the small dispersed particles or drops. The latter is known to be dependent on the radius of the particle. 

The response R of a single-particle light scattering instrument is... 

Heyder, J., and J. Gebhart, 1979. Optimization of response functions of light scattering instruments for size evaluation of aerosol particles, Appl. Opt., 18, 705-711. 

FIG. 5.5 Schematic top view of a typical light scattering instrument showing the different components and the definition of 0. 

Fig. 7. Schematic diagram of the evanescent wave dynamic light-scattering instrumentation (Reproduced with permission from Fytas et al., Science 274 2041 Copyright (1996) American Association for the Advancement of Science)...

The basic features of a light-scattering instrument are evident from the following figure namely a light source and a thermostated ( 0.01 C) sample cell positioned on a precision goniometer which enables a photomultiplier detector to be moved accurately to a... 

If a low-angle light scattering instrument is used, P(0) is close to unity and Mw>i can be calculated directly. For a multi-angle light scattering instrument, the mean-square radius of gyration at each elution volume can also be obtained from P(0) ... 

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