Examination of sensory perceived saltiness of chloride salts' aqueous solutions with different pH values

The paper presents the results of sensory perception of saltiness of various 0.2% aqueous solutions of sodiumchloride, potassium-chloride and their mixtures, at different pH values. Water solutions were prepared with deionised water at three pH values: 4.60, 5.80 and 3.60. To identify potential differences in the salinity of different solutions, ranking test in three sets as well as triangle test in nine sets were organized with eight trained assessors . In all three sets of ranking test, five assessors (62.50%) recognized the increasing level of salinity and correctly ranked the three solutions, while three assessors (37.50%) incorrectly ranked the solutions according to the level of salinity. Completely recognizing of different samples by assessors was established in the case of solutions prepared with deionized water with initial pH values of 5.80 and 3.60, while the least level of recognizing was established in solutions prepared from water with pH value of 4.60 . According to the obtained results, it can be concluded that the highest recognition of the differences in the level of salinity was in solutions prepared with water of pH value 5.80 and 3.60 . In one solution set, at pH values close to 5.80, all of the assessors (100 %) recognized the sample solution, which was different from the other two, while in two sets different sample was recognized by seven of the eight assessors (87.50 %). Full recognition of the difference (100 %) was recorded in the set of solutions prepared with deionised water of an initial pH value of 3.60.