Nitrogen for Thermogravimeters
What is thermogravimetry?
Thermogravimetry, also called thermogravimetric analysis (TGA), is an analytical method that measures the change in mass of a sample as a function of temperature and time. In the analysis, a small amount of the sample is heated up to 1,500 °C in a temperature-stable and inert crucible made of platinum or aluminium oxide in a furnace. The sample holder is connected to a microbalance, which continuously determines the change in mass of the sample during heating.
The change in weight and the temperature allow conclusions to be drawn about the composition of the sample and indications of reactions of the material under the influence of temperature.
How does it work?
During the analysis, the sample chamber is flushed with various gases. Mostly pure nitrogen is used to avoid oxidation and thus falsification of the results.
A nitrogen generator serves as the N2 source here, supplying the thermogravimeter with nitrogen via a supply line.
Examples of samples:
Plastics, foodstuffs, wood, coal, cement, ceramics, soils