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Recently, people have been more attentive to their health.Twenty years ago, we reported the preferrd extent of taste about every single quality of taste, such as saltiness, sweetness and sourness.In this paper, we report the preferred extent of taste we found vecently and how the previous one has been changed.1) The preferred central extent of saltiness was from 0.47% to 0.91%, the intolerable extent was from 1.65% to 2.86%.2) The preferred central extent of sweetness was from 7.0% to 13.8%, the intolerable extent was from 24.5% to 40.5%.3) The preferred central extent of sourness was from 0.020% to 0.110%, the intolerable extent was from 0.210% to 0.730%.4) Compared with the preferred concentration about sweetness we found twenty years ago, both the preferred and intolerable extent have't changed.Both kinds of extent about saltiness and sourness had significant differences and shifted to lower concentration.5) Compared with the extent of the preferred concentration about evrey single quality of taste we found twenty years ago, the preferred central extent have bee narrowed and the preferred central extent of saltiness and sweetness had significant differences.The intolerable extent of the three kinds of tastes has not been changed.

On the Medians of Preferred Concentration and Intorerable Concentrations of Several Chemicals Giving Single Qualities of Taste.(Part2)