Table 4.
Precision and accuracy for vitamins in broccoli
| Type of vitamin | Parameter | Precision | Accuracya | |
|---|---|---|---|---|
| Repeatabilityb | Reproducibilityc | Recovery (%) | ||
| Vitamin C | Meand | 682.66 | 665.05 | 105.15 |
| SD | 15.82 | 19.35 | 3.81 | |
| CV (%) | 2.32 | 2.91 | 3.63 | |
| α-Tocopherol | Mean | 4.26 | 5.24 | 98.68 |
| SD | 0.12 | 0.19 | 1.80 | |
| CV (%) | 2.78 | 3.56 | 1.82 | |
| γ-Tocopherol | Mean | 0.95 | 1.10 | 116.55 |
| SD | 0.04 | 0.07 | 4.74 | |
| CV (%) | 4.20 | 6.07 | 4.07 | |
| Vitamin K | Mean | 1.42 | 1.46 | 99.88 |
| SD | 0.04 | 0.07 | 3.00 | |
| CV (%) | 3.07 | 4.69 | 3.01 | |
| β-Carotene | Mean | 0.52 | 0.54 | 102.27 |
| SD | 0.01 | 0.03 | 1.18 | |
| CV (%) | 2.14 | 5.48 | 1.15 | |
aAccuracy is a measure of the closeness of the analytical result to the true value determined by analyzing a spiked sample
bRepeatability was evaluated using five independent analyses of replicate sample performed on a given day
cReproducibility was evaluated using five independent analyses of replicate sample performed on a different day
dConcentration of vitamins expressed as mg/100 g as dry weight basis