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Thermal Analysis --> MS / FTIR -->
In-Situ EGA
Optical In-Situ Evolved Gas Analysis
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- FTIR: Fourier Transform Infrared Spectroscopy
- Measurement of basic and trace gas components
until ppm range,
(for example H2O, CO2, CO, H2S......)
- Polar Molecules are necessary
- Raman-Spectroscopy
- Measurement of basic gas components
- Also not polar molecules like H2 or N2 measurable
- ELIF: Excimer Laser induced Fragmentation Fluorescence
- UV-Laser-based Method of Measuring of gaseous alkaline compounds
(for example NaCI, NaOH, KCI, KOH)
- Also at 193 nm a entry through UV_saphire is possible
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Advantages of the optical In-Situ window
- No Cooling / Modification of the measuring gas
(for example no out-condensation, no transition reaction, no equilibrium shift)
many materials with high condensation temperature for example alkali metals
(Na, K and their combinations) are now able to be measured, heated capillary
only suitable for some 200 - 250°C, the optical port allows measurement until 1600°C
- No intervention into the measuring system (for example when pulling gas by vacuum)
- No contamation of the measuring gas in the capillary to M/S or FTIR
- Realtime online-Measurement (no dead time until measuring volume enters the measuring instrument
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