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IsoStep – A Quasi-Static Temperature Modulated DSC Technique

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Temperature-Modulated DSC Techniques Such as IsoStep Permit Better Interpretation of Different Thermal Events

IsoStep – a temperature modulated DSC technique

IsoStep permits overlapping effects to be distinguished; this is achieved by separating heat flow into reversing and non-reversing heat flow components.

Temperature modulated DSC differs from conventional DSC in allowing the total heat flow to be separated into reversing and non-reversing heat flow components. Such techniques are frequently applied to help analysts distinguish between processes or transitions that overlap or lie very close to one another.

IsoStep yields new information not obtained by conventional DSC, which allows you to understand and interpret the different thermal events that occur in the sample. Its main benefits include:

  • Separation of heat capacity from overlapping kinetic effects
  • Accurate cp determination using sapphire as reference

IsoStep – a quasi-static temperature modulated DSC technique

In IsoStep, the program consists of a sequence of alternate isothermal and heating segments. The data from the heating segments is used to determine the change in heat capacity and thus the reversing heat flow. The data from the isothermal segments yields the non-reversing heat flow.