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KMID : 0380619910230030330
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Korean Journal of Food Science and Technology
1991 Volume.23 No. 3 p.330 ~ p.335
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The Effect of Sodium Lactate and Sodium Chloride on Water Activity of Water - Sorbitol System
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Abstract
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The values of water activity in the different concentrations of NaCl and sodium lactate were measured by hygrometer in the water-sorbitol systems. Interaction of NaCl and sodium lactate was evaluated by Raoult´s law. The discrepancy between experimental and theoretical value by the Raoult´s law was defined as interaction between water-sorbitol and added solutes in the systems. The changes of interacted water and solutes were observed in whole range of water activity. The value of interacted water (water: sorbitol=1 : 1.1241) obtained by added sodium lactate was found to be higher than sodium chloride. The amount of interacted solute reached maximum about .4w 0.87, while the interactions between added solute and sorbitol showed an increasing tendency below Aw 0.87.
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