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.

Horton et al.

Horton et al. Nutrition Journal 2013 12:80   doi:10.1186/1475-2891-12-80

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