Table 2.
Applied drying protocols in the study.
Drying Process | Step | Ts (°C) | Pc (mbar) | Hold Time (h) | Ramp Toward Step (K/min) | MW Application (W) |
---|---|---|---|---|---|---|
P1 | 1 | −15 | 0.05 | * | 1.0 | 2 × 90 ** |
2 | 30 | 0.05 | 6 | 1.0 | 2 × 90 **/† | |
P2 | 1 | 30 | 0.05 | * | 0.2 | |
P3 | 1 | 30 | 0.05 | * | 0.2 | 2 × 90 ‡ |
P4 | 1 | 10 | 0.05 | * | 0.2 | 2 × 90 § |
2 | 30 | 0.05 | 4 | 1.0 | - |
* Maintained until Pirani signal equaled capacitance, and mass spectrometer revealed water vapor concentration cH2O < 10%. ** In case of MFD. † Applied continuously until the shelf temperature reached 0 °C to not overheat the samples. ‡ Microwave module was stopped after 5 h, 6 h, and 8 h respectively. In case of MFD of F7, 2 × 90 W were applied until Pirani signal equaled capacitance sensor output, and mass spectrometer revealed water vapor concentration cH2O < 10%. § Microwave module was stopped after 10 h and 13 h, respectively. MW, microwave.