In order to check the adequacy
between the different char characteristics, an attempt was made to link the
chemical composition to the structural properties. Figure \ref{102460} shows that the ratio IV/ID is well correlated to the logarithm
of the atomic ratio. Such result was not evidenced previously
in the literature. It indicates that the formation of condensed aromatic
structures starting from small ones is highly correlated to the departure of H
and O atoms which can exist on these structures. Therefore, char ordering is proven
to have an intimal link with the presence of H and O atoms. In this present work, an equation is well established
to associate the chemical composition to IV/ID ratio.