Table 1 Composition of sugars, weak acids, furans, and phenolic compounds present in concentrated undetoxified dilute-acid pretreated hydrolysate of corn stover
| Â | Products | Concentration |
|---|---|---|
Sugars (g/L) | Glucose | 22.36 ± 0.24 |
|  | Xylose | 121 ± 1.08 |
|  | Arabinose | 15.20 ± 0.28 |
Weak acids (g/L) | Formic acid | 1.35 ± 0.24 |
|  | Acetic acid | 14.50 ± 0.25 |
|  | Levulinic acid | 2.96 ± 0.05 |
Furans (g/L) | Furfural | 0.4 ± 0.16 |
|  | HMF | 0.99 ± 0.04 |
Phenolic compounds (mg/L) | 3′4-Dihydroxybenzoic acid | 34.25 ± 6.02 |
|  | 4-hydroxybenzoic acid | 41.34 ± 0.99 |
|  | Vanillic acid | 66.35 ± 5.33 |
|  | Syringic acid | 24.36 ± 1.60 |
|  | 4-hydroxybenzaldehyde | 59.35 ± 1.01 |
|  | Vanillin | 86.65 ± 2.03 |
|  | P-coumaric acid | 133.90 ± 2.64 |
|  | Syringaldehyde | 55.29 ± 2.21 |
|  | Ferulic acid | 214.20 ± 0.99 |
| Â | Cinnamic acid | 0 |
 Total phenolics (g/L) | Total phenolics | 5.33 |