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.
Analytical results of the soil standard reference materials SO-1 and SO-2 in comparison with the certified reference values.
| CRM | As | Cr | Cu | Ni | Pb | Zn |
|---|---|---|---|---|---|---|
| SO-1 | 2.0 (2.0) | 178.5 (170.0) | 57.2 (61.0) | 90.3 (92.0) | 19.5 (20.0) | 141.9 (144.0) |
| SO-2 | 1.9 (1.1) | 17.5 (12.3) | 7.1 (8.0) | 7.8 (8.0) | 21.4 (20.0) | 117.0 (115.0) |
First row indicates measured value
Second row in brackets indicate certified values.
