Turbiscan - Formulaction, Scientific Instruments Analysis for R&D Laboratories

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Multiple light scattering - benefits

The Turbiscan range uses multiple
light scattering, to take up the measurement
challenge of concentrated systems without dilution.

Multiple light scattering - advantages :

Measurement of physical parameters in up to 95% v/v
concentrated systems (for emulsions) and over a
wide size range from 0.05 µm to 1 mm
Measurement of the photon mean free path (l)
and Transport mean free path (l*), absolute
parameters which describe the real state of dispersions,
without mathematical approximations.
Calculation of mean particle diameter or volume fraction
Non-intrusive technique
No sample preparation


	Multiple light scattering - technology

The reading head (or optical sensor) consists of a pulsed near-infrared light source and two synchronous detectors:
The transmission detector picks up the light transmitted through the product, The backscattering detector receives the light backscattered by the product.
	The signal is first treated by Turbiscan analogical to numerical converter. The microprocessor software handles transmitted and backscattered data acquisition and computer dialogue.


	Multiple light scattering - theory
	The measurement performed allows the quantification of the physical processes involved: backscattered (BS) and transmitted (T) light fluxes measured by the optical sensors, depending on the mean path length of the photons in the dispersion: l (for transmission) and l* (for backscattering). These physical absolute parameters depend on particle diameter (d) and volume fraction (phi). They give information on the real dispersion state (no dilution required).




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