The interaction among moisture content, solvent loss and glass transition temperature is relevant for processing of spray-dried
pharmaceuticals, since the glass transition temperature determines the application range of a compound. Conventional Differential
Scanning Calorimetry (DSC) does usually not allow to separate glass transitions from common kinetic effects like evaporation
or crystallization. Based on classical DSC methods, the IsoStepTM method allows the independent determination of heat capacities and kinetic effects, and thus, the separation of kinetic effects
from effects arising from heat capacity changes. This technique is used to separate glass transition and evaporation processes,
and to find the relation between moisture content and glass transition temperature for a pharmaceutical sample based on a
modified Gordon–Taylor equation.