Table 4. Precision of retinol, β-carotene and tocopherols analyses
| Analytes | Repeatability1) | Reproducibility2) |
| Mean±SD3) | RSDr4) (%) | Mean±SD | RSDR5) (%) |
| Retinol (μg/100 g) | 536.60±9.68 | 1.8 | 541.08±14.73 | 2.7 |
| β-Carotene (μg/100 g) | 123.26±3.01 | 2.4 | 125.23±5.65 | 4.5 |
| α-Tocopherol (mg/100 g) | 8.70±0.07 | 0.7 | 8.90±0.15 | 1.7 |
| β-Tocopherol (mg/100 g) | 0.40±0.00 | 0.4 | 0.42±0.02 | 4.2 |
| γ-Tocopherol (mg/100 g) | 7.79±0.07 | 0.8 | 7.93±0.24 | 3.0 |
| δ-Tocopherol (mg/100 g) | 2.38±0.04 | 1.6 | 2.44±0.10 | 4.2 |
Repeatability refers to the results of independent 5 determinations in triplicates obtained by analyzing a sample five times on the same day.
Reproducibility refers to the results of independent 5 determinations in triplicates obtained by analyzing a sample five times on different days.
Standard deviation.
RSDr, Relative standard deviation for repeatability.
RSDR, Relative standard deviation for reproducibility.