Being new to this i have some few questions regarding TGA analysis. I can describe that?

22 June 2023 1 2K Report

1. While am checking the TGA results, i found three columns such as temperature, weight %, Deriva: weight %/ degree celcius. In this the column Deriva: weight % per degree celcius belongs to what.

2. Is the Deriva: weight % per degree celcius is the value for DTG curve? is both the same?

3. What is DGA in TGA analysis. is the DTG and DGA are the same?

4. Is there any software for converting TGA values to DTA values? how to get DTA values?

Kindly help me with the answers for the 4 questions

Joshua Depiver

Thermogravimetric Analysis (TGA) is a technique used in thermal analysis where the mass of a sample is measured over time as it is heated, cooled or held at a constant temperature. Its main use is to characterize materials with regard to their composition.

Deriva: weight %/degree Celsius: This column represents the rate of change of the weight per cent with respect to temperature. It is often called the derivative weight (DTG), derivative thermogravimetry, or the rate of weight loss. It shows how fast the weight changes at each temperature, showing how the decomposition rate (or other reaction) changes with temperature.

Is DTG the same as Deriva: weight %/degree Celsius?: Yes, they are the same. As explained above, this represents the derivative of the weight per cent with respect to temperature.

What is DGA in TGA analysis?: It seems there might be a typo or misunderstanding. In the context of thermal analysis, "DGA" is not a standard term. DSC (Differential Scanning Calorimetry) and DTA (Differential Thermal Analysis) are other common thermal analysis techniques. DTG, as explained above, is a derivative of TGA data.

DTA Values and Conversion Software: TGA and DTA are distinct but complementary techniques. TGA measures a material's weight changes as a temperature or time function. In contrast, DTA measures temperature differences between a substance and a reference material as they are heated or cooled. These techniques often use different types of equipment, so you can't directly convert TGA data to DTA data. However, both types of data can be used together to get a more complete picture of the thermal behaviour of a material. Many types of software are available for interpreting and analyzing TGA and DTA data, but they typically require data gathered using the appropriate type of equipment.

I would recommend consulting with a thermal analysis expert or the manufacturer of your TGA equipment if you need more detailed information or have specific questions about your data. They can provide guidance that is tailored to your specific situation and equipment.

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