Thermogravimetry temperature calibration

Instrumental. All Differential Scanning Calorimetry (DSC) runs were conducted on a Perkin-Elmer DSC-7 attached through a TAC-7 Thermal Analysis Controller to a DEC computer station 325c. All runs were conducted at 10°C/min. in N2 unless otherwise stated. Thermogravimetry was run on a Perkin Elmer TGA-7 attached through the same system as the DSC. Isothermal aging of samples in sealed capillaries were conducted in the DSC cell of a DuPont 9(X) Thermal Analyzer after temperature calibration. 

Data Recording Unit 4.3 Temperature Calibration 4.4 Sample 4.5 Atmosphere 4.6 Heating Rate 4.7 Classification of TG Curves 4.8 Calculation of Mass Change Rates 4.9 Derivative Thermogravimetry (DTG) 4.10 Intercomparison of TG and DTA 4.11 TG Reports 4.12 References 5... 

The calibration of the temperature axis in thermogravimetry is discussed in Chapter 3. 

E 1582 (1993) Standard practice for calibration of temperature scale for thermogravimetry... 

Thermogravimetry needs a check of the accuracy of temperature, mass, and time measurements. Practically all thermobalances are capable of producing good data with only infrequent checks of the calibration via a standard mass. Since changes in volume of the sample take place, a buoyancy correction should be done routinely. The mass, m, of the displaced gas can easily be calculated from the ideal gas law (m = pMAV/RT). 

ASTM El 582-93, Standard Practice for Calibration of Temperature Scale for Thermogravimetry. 

E1131 -03 Standard Test Method for Compositional Analysis by Thermogravimetry E1582-04 Standard Practice for Calibration of Temperature Scale for Thermogravimetry E1641-04 Standard Test Method for Decomposition Kinetics by Thermogravimetry... 

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