Table 1.
Biochemical indicators of diet and nutrition listed by class, laboratory analysis method, and abbreviation
| 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% |
1HPLC-UV high performance liquid chromatography.