I have DTA data of my sample (in microvolt) and temperature (in degree Celsius). Can we still calculate enthalpy from this data? i know we can calculate enthalpy from DSC data given in Watt(W). But, how can we convert DTA data in microvolt to Watt or Joules to find enthalpy? Kindly help me. so confused.
Some DTA instruments allow you to "calibrate" the DTA signal into DSC; for example, based on fusion enthalpies of pure metals. In such a case, the expected specific heat (J/g) is correlated with the DTA peak area (uV.s/g) and the calibration factor is then used for your data. However, this procedure (1) cannot be done without calibration measurements, i.e., the calculation is not theoretical and (2) the resulting enhalpies are rather semi-quantitative and the error can be as high as 25 %, especially for broad peaks.
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