Table 4.
Ferulic acid contents of DDGS samples, obtained from various fuel ethanol production plants across the United States compared with a sample of yellow dent corn.
| Item | Ferulic acid, mg/g dry matter |
|
|---|---|---|
| Free ferulic acid | Total ferulic acid | |
| DDGS sample | ||
| 1 | 0.063 | 9.511 |
| 2 | 0.036 | 8.037 |
| 3 | 0.087 | 7.406 |
| 4 | 0.044 | 7.824 |
| 5 | 0.033 | 6.907 |
| 6 | 0.036 | 6.976 |
| 7 | 0.035 | 7.301 |
| 8 | 0.034 | 7.606 |
| 9 | 0.036 | 7.546 |
| 10 | 0.038 | 6.801 |
| 11 | 0.033 | 7.071 |
| 12 | 0.041 | 7.410 |
| 13 | 0.018 | 7.395 |
| 14 | 0.061 | 7.263 |
| 15 | 0.042 | 6.774 |
| 16 | 0.040 | 7.049 |
| Mean ± SD | 0.042 ± 0.016 | 7.455 ± 0.675 |
| Corn sample | 0.011 | 2.503 |
DDGS = distillers dried grains with solubles.