Figure 4. Observedvs. calculated values (a) and distribution of the residual (b) of
density
314 ionic liquids can be divided into 13 types cations and 25 types
anions. Figure 5 analyzes AARD and the ρ data points of
each type of ILs. It can be seen that the predicted AARD values
of [Am][RSO4] and
[Dbu][RSO3] are relatively large, which may lead
to inaccurate prediction results for this two types ILs. However, most
of the data point errors are within the acceptable range. Therefore,
this model can be used to predict the density of ILs with different
structures under different temperatures and pressures.