The relationship between the side tastes of masking stimuli and masking in binary mixtures

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Abstract
Subjects estimated the sweetness of HOH, NaCl, Q 2 SO 4 , sucrose and of the binary mixture of the three compounds. Another group of subjects made independent estimates of the bitterness and saltiness of HOH, Q 2 SO 4 , NaCl and of the binary mixtures of NaCl and Q 2 SO 4 . Apart from their specific main taste, the stimuli appear to also possess a side taste in the modality equal to the suppressed component, with the exception of Q 2 SO 4 which showed no sweet side taste. The side tastes are negatively related to masking, thus the higher a specific side taste, the lower the amount of suppression of that taste in the binary mixture. Apparently, the subjects add these side tastes of the masking agents to the specific quality of the suppressed sensations in the mixture. In this way spurious results of low masking or even enhancement are produced. The obtained results were compared to data from a study in the literature on taste masking.

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