Baseline for Accelerating Rate Calorimetry (ARC) Temperature Data

In the case of ARC Temperature data, Prepare Data includes also the possibility to define an interpolated baseline that is subtracted from the data. There are four possibilities:

• None

• Left Horizontal (ARC Temp. HWS)

• Left Tangential (ARC Temp.)

• Tangential (ARC Temp.)

Baseline: None

None means that no baseline is applied.

Baseline: Left Horizontal (ARC Temp. HWS)

A horizontal baseline is used where the constant value of the baseline is the data point at the left cursor. Typical application: Heat-Wait-Search (HWS) under adiabatic conditions.

Baseline: Left Tangential (ARC Temp.)

The baseline is a tangential line defined around the point at the left cursor. Typical application: Measurement with constant heater power leading to the same heating rate before and after the reaction.

 

Baseline: Tangential (ARC Temp.)

Two tangential lines are defined around the points at the left and right cursors reflecting the heating rates before (educt) and after the reaction (product). The baseline is an interpolation between these heating rates using the signal change during the reaction as a weight function. Typical application: Measurement with constant heater power leading to different heating rates before and after the reaction; this is mostly due to a change in specific heat during the reaction.