Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Estimated and Reference Elements Concentrations
| Sequence | Element | Estimated element concentration (ppm) | Reference element concentration (ppm) |
|---|---|---|---|
| 1 | Sodium | 975 | 1,000 |
| 2 | Potassium | 550 | 570 |
| 3 | Lithium | 15 | 15. 1 |
| 4 | Zinc | 27.3 | 28 |
| 5 | Copper | 9.99 | 9.99 |
| 6 | Iron | 96.24 | 107 |
| 7 | Calcium | 39,600 | 39,800 |
| 8 | Magnesium | 640 | 670 |
| 9 | Phosphate | 56,000 | 56,773 |
