A number of compounds are investigated for DSC calibration during cooling. Adamantane and Zn show fast reversible transitions
and can be applied both for temperature and for heat calibration. A third compound, namely 4,4′-azoxyanisole, has a liquid
crystal to isotropic liquid transition at 409 K. This compound can be used for temperature calibration. Heat calibration with
this compound is more problematic because of the small heat effect and the construction of the baseline. Two other compounds,
namely Hg and Pb, show a slight undercooling. Nevertheless they can be used for heat calibration, and possibly also for temperature
calibration during cooling.