Table 4.
Retention of zinc overtime, as percentage from zinc concentration in uncooked fortified rice prior to storage (T0).
| 25 °C/60% Humidity | ||||
| Type | T0 | T90 | T180 | T360 |
| Hot extrusion | 100 | 99.5 (± 2.8) | 94.5 (± 2.8) | 100.8 (± 8.0) |
| Cold extrusion | 100 | 103.1 (± 7.0) 4 | 93.7 (± 5.4) 3 | 101.8 (± 3.9) |
| Coated | 100 | 102.3 (± 8.3) 4 | 91.0 (± 3.5) 3 | 96.5 (± 6.0) |
| 40 °C/75% Humidity | ||||
| Type | T0 | T30 | T90 | T180 |
| Hot extrusion | 100 | 87.6 (± 6.2) b,1,3,4 | 98.5 (± 2.3) 2 | 96.3 (± 2.5) 2 |
| Cold extrusion | 100 | 99.5 (± 5.8) a,c | 100.4 (± 4.4) | 101.9 (± 8.9) |
| Coated | 100 | 87.9 (± 6.8) b,1,3,4 | 99.8 (± 3.8) 2 | 96.8 (± 4.3) 2 |
Note: All values are means ± SD. 1 significantly different from T0; 2 significantly different from T30; 3 significantly different from T90; 4 significantly different from T180; a significantly different from Hot Extrusion; b significantly different from Cold Extrusion and c significantly different from Coating.