Process monitoring: Turbiscan™ Online - FORMULACTION - #2

Text version of the page

On line MONITORS AND QUANTIFIES THE EFFECTS OF PROCESS VARIABLES ON YOUR DISPERSED SYSTEM Multiple light scattering measurement for concentrated dispersions analysis > The only optical characterisation parameters for concentrated dispersions Emulsification of a concentrated dispersion. User friendly interface > to improve process efficiency and product quality > through multiple light scattering > indicator > software performances HOW IT WORKS? THE INNOVATE ABSOLUTE PHYSICAL QUANTIFICATION ë ë* The TurbiScan On Line’s Indicator allows the analysis of the dispersion characteristics. It displays automatically the transmitted or backscattered light intensities in real time (transmitted light intensity for optically thin dispersions, backscattered intensity for dense media). Moreover, you can choose to indicate the transmission or the backscattering manually. These set up intensities are percentage compared to intensities Transmitted or Backscattered by external standards. Specifically designed for laboratory, pilot plant and production set up, it operates on emulsions and suspensions without dilution: • 0 to 60% v/v concentration • 0,1 ìm to 5 mm particle size. The 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 optical sensor acquires transmission and backscattering data up to every 0,1 second (every 0,1 to every 10 seconds). The signal is first treated by TurbiScan On Line’s current to voltage converter. The indicator microprocessor’s software handles data acquisition, real time indication of the transmitted and backscattered intensities and computer dialogue. The TurbiSoft On Line software shows all dispersed phase changes in an easy to understand format. All the acquisitions can be programmed: you can choose the frequency and the duration of the acquisitions in one to several phases of work. The TurbiSoft On Line has a toolbar to make frequently used functions easier to access. The toolbar is designed with icon buttons for one touch easy to use. Available functions include viewing of transmission, backscattering, ë, ë*, calculation of mean diameter or volume fraction on a zone or on a point, auto zoom, define zoom region, set acquisitions, acquire, stop acquiring, refresh the screen. Typical windows buttons are also included in the toolbar (new file, open, save, print, cut, copy and paste). ë ë* BACKSCATTERING TRANSMISSION The backscattered (BS) and transmitted (T) light fluxes measured by the optical sensors depend on the mean path length of photons in the dispersion: ë (for transmission) and ë* (for backscattering). These physical characterisation parameters are directly related to particle diameter (d) and volume fraction (Ö) mean path length of photons & in the dispersion (in ìm) ë* BS d % of backscattered light mean path length of photons (in ìm) mean particule diameter (in ìm) Time Time Time Concentration and refractive indexes Time Dissolution of a concentrated dispersion application example g(d) = asymmetry factor Qs(d) = scattering efficiency factor r = tube radius