Table 5. Accuracy of retinol, β-carotene and tocopherols analyses
SRM1) | Analytes | Accuracy | Recovery4) (%) |
Certified value2) | Analytical value3) |
SRM 1869 | Retinol (μg/100 g) | 1,927.0±32.0 | 1,945.89±12.03 | 101.0 |
β-Carotene (μg/100 g) | 105.0±26.0 | 96.79±2.80 | 92.2 |
α-Tocopherol (mg/100 g) | 21.72±0.62 | 21.80±0.12 | 100.4 |
β-Tocopherol (mg/100 g) | 0.42±0.07 | 0.47±0.02 | 110.4 |
γ-Tocopherol (mg/100 g) | 9.94±0.51 | 10.19±0.00 | 102.5 |
δ-Tocopherol (mg/100 g) | 3.25±0.29 | 3.01±0.07 | 92.7 |
SRM, standard reference material; SRM 1869, Infant/Adult Nutritional Formula Ⅱ(milk/whey/soy based).
The certified value for the contents of corresponding analytes in SRM provided by NIST.
The analytical value obtained in this study.
Recovery (%) = analytical value / certified value × 100.