Figure 3: Time courses of xylose yield at different acid concentrations. □: 1.5% (w/v) H_{2}SO_{4} and 0.6% (w/v) H_{3}PO_{4}; ●: 2% (w/v) H_{2}SO_{4} and 0.8% (w/v) H_{3}PO_{4}; ∆: 2.5% (w/v) H_{2}SO_{4} and 1% (w/v) H_{3}PO_{4}. Other conditions: liquid to solid ratio 3 mL/g, 130°C. 
