Analysis of aggregation and dispersion states of small particles in concentrated suspension by using diffused photon density wave spectroscopy

Colloids and Surfaces. B, Biointerfaces
Jun TanguchiYasuyuki Okamura

Abstract

Recently, inspection of chemical components like melamine plays an important role in food industry for the food safety. However, conventional analyzing methods require a lot of preparations and much of time. We propose a real-time method for investing the mean particle size and number density of concentrated suspensions without any preparations. There are several techniques of analyzing concentrated suspensions. Laser light scattering (LLS) and dynamic light scattering (DLS) are used to measure the particle size. Fourier transform infrared spectroscopy (FT-IR) is used to measure the number density. They have been successfully describing the physical and dynamics characteristics near single light scattering regions. On the other hand, they require samples to be highly diluted. This is a major disadvantage in studying real concentrated suspensions, or phenomena such as gelation. Our proposed method diffused photon density wave spectroscopy (DPDWS) is based on the multiple light scattering theory. Thus, DPDWS measures the particle size and number density of the concentrated suspensions without dilution in real time. Diffused photon density wave (DPDW) is a spherical energy wave generated from the intensity-modulated point light so...Continue Reading

References

May 30, 2001·Colloids and Surfaces. B, Biointerfaces·A J. VasbinderK G. de Kruif
Oct 7, 2004·Colloids and Surfaces. B, Biointerfaces·Marcela Alexander, Douglas G Dalgleish

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Citations

Sep 3, 2011·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Roland Hass, Oliver Reich
Mar 3, 2015·Analytical and Bioanalytical Chemistry·Roland HassOliver Reich
Oct 4, 2016·Analytical and Bioanalytical Chemistry·Marvin MünzbergOliver Reich
Mar 13, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Katharina BresselTim J Wooster

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