Table 3.
Mineral composition parameters of sweet potato flours (Dry weight basis).
| Elements (mg/100g) | MDP | KJP | CFSP | FAO (2010) and USDA (2010) Limits (mg/day) |
|---|---|---|---|---|
| Calcium (Ca) | 45.5 ± 0.31b | 50.6 ± 0.22a | 33.1 ± 0.17c | 19-881 |
| Magnesium (Mg) | 125.7 ± 0.23b | 148.2 ± 0.10a | 124.0 ± 0.91c | 4.5-452 |
| Potassium (K) | 1226.5 ± 0.11c | 2350.0 ± 0.42a | 1805.0 ± 0.66b | 19-502 |
| Sodium (Na) | 458.0 ± 0.32b | 615.5 ± 0.12a | 385.0 ± 0.43c | 30-134 |
| Iron (Fe) | 8.8 ± 0.53b | 10.7 ± 0.23a | 8.8 ± 0.11b | 1-5.6 |
| Zinc (Zn) | 4.4 ± 0.10a | 4.1 ± 0.09b | 3.5 ± 0.11c | 0.23-2.1 |
| Phosphorous (P) | 402.5 ± 0.21a | 313.5 ± 0.11b | 285.0 ± 0.32c | |
| Cadmium (Cd) | ND | ND | ND | |
| Nickel (Ni) | 0.02 ± 0.00b | 0.01 ± 0.00a | 0.01 ± 0.00a | |
| Chromium (Cr) | ND | ND | ND | |
| Copper (Cu) | 0.01 ± 0.00a | 0.01 ± 0.00a | 0.01 ± 0.00a | |
| Lead (Pb) | ND | ND | ND | |
| Na/K | 0.37 | 0.26 | 0.21 | <1 |
Values are averages of triplicate readings (mean ± standard deviation). Means within a row followed by different superscripts letter(s) are significantly different (p ≤ 0.05).
Key:
MDP- Mother's Delight Orange-fleshed Sweet Potato (UMUSP002).
KJP- King J Orange-fleshed Sweet Potato (UMUSP001).
CFSP- Cream-fleshed Sweet Potato.
ND- Not detectable.
FDA- Food and Drug Administration.