Abstract
SummaryThis work describes the application of a simplified method to predict the water activity (aw) of binary aqueous solutions in a range of concentrations relevant to intermediate moisture foods. The water activity as a function of molality for several solutes (electrolytes and non‐electrolytes) is described by the equation, aw, = 1 − Km, where K is a constant and m is the molality. Values of K are reported for fifteen non‐electrolytes and eight electrolytes. The accuracy of water activity prediction by this method satisfies the actual needs in food research.
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