Supercritical Fluid Extraction of Quinones from Compost for Microbial Community Analysis

Figure 5

Comparisons of quinone profile between the SFE and organic solvent extraction methods. Sample: 0.3 g dry compost of food waste and wood chips for both methods. Organic solvent extraction conditions : chloroform : methanol = 2 : 1 (20 mL); 15 h. SFE conditions: 25 MPa; 90% CO₂-10% methanol, flow rate of 3 mL min⁻¹; 45°C; 30 min; number of samples examined = 3.