Table 2
Extraction parameters of the participating laboratories using IEC FDIS 62788 (IEC) and GB/T29848-2018 (GB) standard.
| Equipment | |
|---|---|
| PI Berlin (IEC) | Soxhlet-like fluidised bed hot extraction (fexIKA®) |
| CSP Halle (IEC) | Soxhlet apparatus |
| PI Berlin (GB) | Reaction flask, reflux condenser |
| Lab A (GB) | Reaction flask, reflux condenser |
| Solvent | |
| PI Berlin (IEC) | Tetrahydrofuran (THF) |
| CSP Halle (IEC) | Toluene |
| PI Berlin (GB) | Xylene |
| Lab A (GB) | Xylene |
| Particle size | |
| PI Berlin (IEC) | (5 × 5) mm2 |
| CSP Halle (IEC) | (5 × 5) mm2 |
| PI Berlin (GB) | (1 × 1) mm2 |
| Lab A (GB) | (2.5 × 2.5) mm2 |
| Antioxidant | |
| All | None |
| Extraction duration | |
| PI Berlin (IEC) | 150 cycles (∼15 h) unless otherwise stated |
| CSP Halle (IEC) | 24 h |
| PI Berlin (GB) | 5 h unless otherwise stated |
| Lab A (GB) | 5 h |
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