Ultrasonically triggered freezing of aqueous solutions: Influence of initial oxygen content on ice crystals׳ size distribution

Samples of mannitol׳s aqueous solution at various contents of dissolved oxygen were frozen with the help of ultrasound and the ice crystals size distributions were measured by optical microscopy. Increasing the oxygen content led to a fair decreasing of the average crystals size and an increasing of the homogeneity of the size of crystals within the sample. The average size appeared simply as inversely proportional to the oxygen content in the initial liquid solution. •Solution with various contents of oxygen was frozen by ultrasounds in test tubes.•Increasing oxygen content led to a linear decreasing of the average crystals׳ size.•Increasing oxygen content led to increasing of the homogeneity of crystals׳ sizes.