Table 3.
Particle size (PS) stabilities of the different formulations containing lutein (Lut) and zeaxanthin (Zx) under different pH conditions over 30 d of storage at 40 °C.
| Sample | pH | PSs of Lut-loaded samples (nm) |
PSs of Zx-loaded samples (nm) |
||
|---|---|---|---|---|---|
| initial | After 30 d | initial | After 30 d | ||
| Control | 2.5 | 112.2 ± 22.1 | 235.8 ± 38.6 | 104.7 ± 9.2 | 266.4 ± 23.9 |
| 5.5 | 105.8 ± 13.4 | 216.5 ± 23.3 | 114.6 ± 12.3 | 249.0 ± 37.6 | |
| 7.5 | 113.6 ± 14.2 | 228.6 ± 44.2 | 104.6 ± 36.0 | 238.8 ± 19.9 | |
| 9.5 | 98.3 ± 17.3 | 203.5 ± 33.2 | 102.4 ± 7.5 | 214.6 ± 16.6 | |
| WPI | 2.5 | 196.0 ± 7.3 | 212.1 ± 15.1 | 189.2 ± 7.2 | 203.0 ± 23.7 |
| 5.5 | 371.2 ± 21.9 | 373.5 ± 25.8 | 318.1 ± 33.5 | 318.6 ± 46.1 | |
| 7.5 | 199.8 ± 12.7 | 192.1 ± 14.2 | 197.7 ± 23.3 | 198.5 ± 20.4 | |
| 9.5 | 198.4 ± 23.6 | 207.2 ± 18.3 | 194.9 ± 32.0 | 196.3 ± 17.0 | |