Primary standard
NOTES: Pure copper, also good for doing the EDS energy calibration.
 |  |
| Position | 49 |
| Mineral | Copper |
| Sample Name | Copper |
| Type | Metal |
| Nominal formula | Cu |
| Supplier | Electric wire |
| Source | Unknown |
| Original reported analysis | High-purity |
| Composition quality | Primary standard |
| Comments | No impurities detected by EDS. |
| Cu | 100 |
