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Thermogravimetric Analyzer (TGA)

prepASH the Brand name of the TGA from Precisa, combining high performance, ease of operation, precision, and integrity of measurement for efficient use of time and accuracy/traceability in all measurements. Combining furnace, high precision balance, and automation, the prepASH Series enables a huge reduction in workload through the simultaneous analysis of moisture, ash, and volatiles content for up to 29 samples. Widely used for Proximate Analysis of Coal and Coke and determination of Loss on Ignition. 

  • 29 samples can be analyzed simultaneously
  • Fully Automatic Thermogravimetric analysis with endpoint recognition replaces drying oven and muffle furnace
  • Touch screen control panel. No need for a separate computer
  • Dynamic measurement enables early termination of a run if weight loss ceases thus minimizing run-times and reducing energy costs
  • Compliant to 21 CFR Part 11
  • Compliant to ASTM D5142 & ASTM D7582
  • The Heating Element remains enclosed with quartz glass for enhancing lifetime


Some common applications of thermogravimetry include:

  1. Determining the thermal stability of polymers, ceramics, and other materials.
  2. Investigating the decomposition kinetics of organic and inorganic compounds.
  3. Studying the adsorption and desorption behavior of gases on surfaces.
  4. Evaluating the purity and composition of pharmaceuticals and food products.
  5. Characterizing the properties of catalysts and their surface area.


How does thermogravimetry differ from differential scanning calorimetry (DSC)?

Thermogravimetry and differential scanning calorimetry (DSC) are both thermal analysis techniques used to study the thermal properties of materials.

Main Differences:

Thermogravimetry measures the weight changes of a sample as it is heated or cooled under controlled conditions. This technique is used to determine the thermal stability and decomposition behavior of materials. The weight loss or gain of the sample is recorded as a function of temperature or time, providing information about the mass changes and the rate of reaction.

On the other hand, Differential Scanning Calorimetry (DSC) measures the heat flow into or out of a sample as it is heated or cooled under controlled conditions. This technique is used to determine the thermal properties of materials, such as melting point, glass transition temperature, and specific heat capacity.