Table 2.
Method precision for measurement of total and all-trans-β-carotene in test materials Nos. 1–8a
| Total β-carotene, mg/g | All-trans-β-carotene, mg/g | |||||
|---|---|---|---|---|---|---|
| Test material No. | Extraction variant | LC system | Mean value, n = 10 | RSD, % | Mean value, n = 10 | RSD, % |
| Multivitamin tablets (1) | c,2 | A | 0.494 | 2.4 | 0.428 | 3.5 |
| Softgels with β-carotene in soybean oil (2) | c,3 | A | 47.1 | 1.5 | 45.2 | 1.4 |
| Capsules with β-carotene in fish oil (3) | c,1b | B | 0.0520 | 3.1 | 0.0310 | 4.6 |
| Softgels with β-carotene from carrot oil extract (4) | c,3 | B | 9.64 | 2.2 | 6.62 | 2.4 |
| Tablets with β-carotene (5) | d,3b | A | 49.3 | 2.6 | 39.2 | 3.0 |
| Capsules with β-carotene (6a) | d,2b | A | 23.7 | 10.4 | 22.8 | 10.4 |
| Capsules with β-carotene (6b) | c,3 | A | 26.2 | 1.2 | 25.1 | 1.2 |
| Capsules with β-carotene (7) | c,3 | B | 32.2 | 4.4 | 23 | 5.4 |
| Beadlets raw material with pure β-carotene (8) | b | A | 201 | 1.3 | 160 | 2.0 |
a
Analyses were performed in duplicate by 2 technicians on 5 different days.
b
Only for validation purpose (analytical method prescribes other variants for these test materials).