Browsing by Author "Truksina, T. S."

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    Kontinuierliche Kristallisationskontrolle am Beispiel von Ascorbinsäure
    (1989) Rochlenko, A. A.; Truksina, T. S.; Macievskij, G. A.; Pertschi, Ottmar (Übersetzer)
    A method for continuous monitoring (without sampling) of the crystallisation process was developped for ascorbic acid. The method is based on measuring ultrasound absorption (at 2 - 3 MHz) by an ascorbic acid suspension (satd. aq. soln.) containing a known amount of added ascorbic acid crystals und continuous stirring. The method allows measuring the concentration of crystals at any period of the crystallization process and at different temperature regiments. The results did not differ significantly from those obtained by the traditional gravimetric method.
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    Kontrollverfahren zur Kristallisation von Ascorbinsäure
    (1989) Rochlenko, A. A.; Macievskij, G. A.; Truksina, T. S.; Zaruckij, V. V.; Pertschi, Ottmar (Übersetzer)
    Crystallization of ascorbic acid from its aquivalent saturated solutions with cooling from 60 to 4° was controlled by measuring the concentration of the crystals in the solution. The process was simplified by measuring the concentration of the crystals in the solution by passing 2 - 3 MHz ultrasonic vibrations through the constantly stirred solution, and the concentration of crystals was determined from the absorption coefficient of ultrasonic vibrations.