The ICTAC Committee on Standardisation has formed a Task Group to investigate the suitability of the ICTAC Certified Reference
Materials for DTA, covering the temperature range 450°–1100°C, for accurate temperature calibration purposes and to evaluate
their potential as enthalpy calibrants for DTA and DSC equipment. This paper reports the results of preliminary round-robin
studies on barium carbonate and strontium carbonate, using a dual-point calibration method based on the melting points of
aluminium and gold. In addition the fusion of ICTAC potassium sulphate has been investigated as a possible calibration transition.