Biochemical indicator | Method imprecision |
---|---|
Fat-soluble vitamins (n = 5) | |
HPLC-UV1 | |
Vitamin A (retinol) | 3.5-3.8% at 0.70-3.50 μmol/L |
Vitamin A (retinyl palmitate) | >30% at < 0.15 μmol/L |
Vitamin A (retinyl stearate) | >30% at < 0.15 μmol/L |
Vitamin E (alpha-Tocopherol) | 2.6-3.0% at 11.6-232 μmol/L |
Vitamin E (gamma-Tocopherol) | 3.0-4.0% at 2.40-11.9 μmol/L |
Carotenoids (n = 7) | |
HPLC-UV | |
alpha-Carotene | 6.0-13.0% at >0.28 μmol/L |
beta-Carotene | 6.0-13.0% at >0.28 μmol/L |
cis-beta-Carotene | 6.0-13.0% at >0.28 μmol/L |
beta-Cryptoxanthin | 6.0-13.0% at >0.27 μmol/L |
Lutein + Zeaxanthin | 6.0-13.0% at >0.26 μmol/L |
trans-Lycopene | 6.0-13.0% at >0.28 μmol/L |
total Lycopene | 6.0-13.0% at >0.28 μmol/L |
Iron indicators (n = 5) | |
Immunoturbidimetry | |
Ferritin | 6.1-7.4% at 79–426 μg/L |
Colorimetry | |
Iron | 1.7-1.9% at 13.1-30.0 μmol/L |
Unbound Iron-Binding Capacity | 2.5-3.0% at 28.0-41.4 μmol/L |
Total Iron-Binding Capacity | N/A (calculated value) |
Transferrin Saturation | N/A (calculated value) |
Trace element (n = 1) | |
Atomic absorption spectrometry | |
Selenium | 0.04% |