But for benzene, when treated with SDM-A there was a turning point in its adsorption isotherm, which corresponding to the dividing point between monomolecular and multimolecular layer adsorption.

在SDM-A理苯吸附时，出现折线形吸附等温线，折线转折点单分子层吸附与多分子层吸附分界点。