The sweetness index of fruit, an estimate of total sweetness perception, was calculated based on the amount and sweetness properties of individual carbohydrates in strawberry (Qian, 2006). The contribution of each carbohydrate was calculated, based on the fact that fructose is 2.30 and sucrose 1.35 times sweeter than glucose and, hence, the sweetness index was calculated as (1.00 [glucose]) + (2.30 [fructose]) + (1.35 [sucrose]).
The importance of individual compounds to taste, the dose-over-threshold value (DOT), was calculated as the ratio of actual concentration and taste threshold for the given compound