Thermodynamics Research Center / ThermoML | Thermochimica Acta

Development of a certified reference material for calibration of DSC and DTA below room temperature: NMIJ CRM 5401-a, Cyclohexane for Thermal Analysis

Shimizu, Y.[Yoshitaka], Ohte, Y.[Yoko], Kato, K.[Kenji]
Thermochim. Acta 2013, 568, 61-6
ABSTRACT
For quality assurance of DSC and DTA in a low temperature region below room temperature, we have developed "NMIJ CRM 5401-a, Cyclohexane for Thermal Analysis" applicable to calibration of DSC and DTA in the low temperature. Temperatures and enthalpies of solid-solid phase transition and fusion as certified values and purity in amount of substance fraction as information were measured by adiabatic calorimetry. The certified values were consistent with their literature values within expanded uncertainties of the certified values and they are traceable to the SI. Purity in amount of substance fraction was measured by fractional melting method based on freezing point depression method and was confirmed to be more than 0.9999. NMIJ CRM 5401-a was produced based on a quality system in compliance with ISO Guide 34: 2000. NMIJ CRM 5401-a is useful for quality assurance of DSC and DTA measurement by using for calibration, quality control and validation.
Compounds
# Formula Name
1 C6H12 cyclohexane
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Air at 1 atmosphere
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal
  • Crystal
  • Liquid
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Air at 1 atmosphere
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal
  • Crystal
  • Liquid
  • Gas
  • Adiabatic calorimetry
  • 1