Correction of raw data - LeonSaal/TGA-FTIR-hyphenation-tool-kit GitHub Wiki

TG correction

For TG, a buoyancy blank value from an empty crucible is subtracted:

Fig.: Baseline correction for the thermal decomposition of Calciumoxalate monohydrate

IR correction

For IR, the signal is shifted in y direction so that the cumulated noise in phases of no release is constant.

Before:

Fig.: Cumulative IR-signal for the thermal decomposition of Calciumoxalate monohydrate, prior to correction

After:

Fig.: Cumulative IR-signal for the thermal decomposition of Calciumoxalate monohydrate, after correction

In the special case of CO2, the signal fluctuates periodically. Therefore, the baseline is aligned with the measurement and then subtracted from it:

Fig.: CO2 correction for the thermal decomposition of Calciumoxalate monohydrate