Table 2. Variations in mineral contents of rubber seed meal samples.
| Mineral element | *RRSM (mg/100 g) | *BRSM (mg/100 g) | *FRSM (mg/100 g) | **Safety limit (mg/100 g) | **Sources for the safety limits |
|---|---|---|---|---|---|
| Magnesium | 119.03b ± 0.88 | 112.15c ± 0.45 | 122.72a ± 1.50 | 220-260 | FAO/WHO (2001) |
| Phosphorus | 225.74b ± 0.60 | 220.72c ± 1.35 | 228.93a ± 0.54 | 700 | FAO/WHO (2001) |
| Calcium | 205.08 a ± 3.72 | 193.57 b ± 0.00 | 205.13a ± 0.33 | 1000 | FAO/WHO (2001) |
| Iron | 5.88b ± 0.23 | 4.95c ± 0.04 | 7.86a ± 0.23 | 8-18 | FAO/WHO (2001) |
| Zinc | 1.29b ± 0.06 | 0.99c ± 0.08 | 1.56a ± 0.00 | 8-11 | WHO (2012a) |
| Potassium | 795.28a ± 1.60 | 778.10b ± 5.05 | 800.16a ± 1.56 | 3500 | WHO (2012a) |
| Sodium | 10.21b ± 0.02 | 9.84c ±0.31 | 10.52a ± 0.04 | <2000 | WHO (2012b) |
| Manganese | 0.41a ± 0.01 | 0.35b ± 0.01 | 0.39ab ± 0.01 | 1.8-2.3 | NIH (2020) |
| Lead | 0.12a ± 0.00 | 0.07c ± 0.01 | 0.10b ± 0.01 | ||
| Selenium | 0.03 a ± 0.00 | 0.02a ± 0.00 | 0.00 b ± 0.00 | 0.055 | Institute of Medicine (2000) |
| Nickel | ND | ND | ND |
Notes:
*
Data of the current study.
**
Published references.
Means with same superscripts in the same row are not significantly different (p > 0.05).
Key: RRSM, raw rubber seed meal; BRSM, boiled rubber seed meal; FRSM, fermented rubber seed meal; ND, not detected