Arrangement and method to apply diffusing wave spectroscopy...

G - Physics – 01 – J

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G01J 3/44 (2006.01) G01N 21/47 (2006.01) G01N 21/49 (2006.01)

Patent

CA 2326987

Arrangement for measuring physico-chemical properties of liquid, such as solutions, dispersions and emulsions. The arrangement comprises a light source (1) for producing and emitting light in the liquid (7), a detector for detecting said light after being scattered by said liquid (7), processing means arranged for receiving an output signal from said detector. The processing means is further arranged to calculate a maximum value of the mean square displacement .DELTA.rm2 from the autocorrelation function g(2) as a function of time and the value of the property from said calculated maximum value of the mean square displacement .DELTA.rm2.

L'invention concerne un dispositif de mesure de propriétés physico-chimiques de liquides, tels que des solutions, des dispersions et des émulsions. Le dispositif comprend une source lumineuse (1) destinée à produire et à émettre une lumière dans le liquide (7), un détecteur destiné à détecter cette lumière après sa diffusion par le liquide (7) et un dispositif de traitement destiné à recevoir un signal de sortie provenant du détecteur. Le dispositif de traitement est également destiné à calculer une valeur maximale de déplacement quadratique moyen ?.DELTA.r¿m??2¿? à partir de la fonction d'autocorrélation g?(2)¿ comme fonction du temps et la valeur de la propriété à partir de cette valeur maximale calculée de déplacement quadratique moyen ?.DELTA.r¿m??2¿?.

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