Table 3. Relevant mass fractions and area densities for the NIST Standard Reference Material 1577b bovine liver. The area densities of the calibrant were used to determine the absolute concentrations in human brain tissue sections. X-ray emissions energies were obtained from [31].
| Element | Kα1 (keV) | mass fraction (g [100 g]−1) | area density (g cm−2) |
|---|---|---|---|
| K | 3.31 | 0.994 | 1.12 × 10−8 |
| Ca | 3.69 | 160 | 1.31 × 10−12 |
| Mn | 5.90 | 10.5 | 1.19 × 10−13 |
| Fe | 6.40 | 184 | 2.08 ×10−12 |
| Cu | 8.05 | 160 | 1.81 × 10−12 |
| Zn | 8.64 | 127 | 1.44 × 10−12 |
| As | 10.54 | 0.05 | 5.65 × 10−16 |
| Se | 11.22 | 0.73 | 8.25 × 10−15 |
| Br | 11.92 | 9.7 | 1.10 × 10−13 |