Sweetness intensity of a binary sugar mixture lies between intensities of its components, when each is tasted alone and at the same total molarity as the mixture

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Abstract
The taste interaction between two taste substances in a mixture can be assessed in different ways. In the usual approach, the response to a mixture is compared with the sum of the responses to the mixture's components (i.e. ‘the summated response comparison’). This approach has led to a large variety of classifications and descriptions of the taste interaction. An alternative way of assessing taste interaction is by comparing the intensity of a mixture with the intensities of the single compounds at those particular concentrations, where the mixture and each of the single compounds have equal molarities (i.e. ‘the equimolar comparison’). This approach follows from the concept of equiratio taste substance mixtures. In the present study, the data of seven experiments on binary sugar mixtures were re-analysed in order to enable a comparison at equimolar concentrations. The outcomes of these analyses showed mat the taste interaction between any two sugars in a binary mixture follows two general rules. Firstly, the sweetness intensity of a binary sugar mixture is intermediate to the sweetness intensities of its components, when each is tasted alone and at the same total molarity as the mixture. Secondly, as the proportion of the sweetest sugar in the mixture increases, the sweetness intensity of that mixture gets near the sweetness intensity of the sweetest substance, tasted alone and at the same total molarity as the mixture.

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