| Element |
Concentration, ppm |
| Ag |
<0.4 |
| Al |
<0.05 |
| As |
<0.5 |
| Au |
<0.5 |
| B |
<0.4 |
| Ba |
<0.1 |
| Be |
<0.02 |
| Bi |
<0.5 |
| Cd |
<0.02 |
| Co |
<0.4 |
| Cr |
<0.4 |
| Cu |
<0.05 |
| Fe |
<0.1 |
| Ga |
<0.5 |
| Ge |
<0.5 |
| Hg |
<0.5 |
| I |
<0.5 |
| In |
<0.5 |
| La |
<0.4 |
| Li |
<0.4 |
|
| Element |
Concentration, ppm |
| Mg |
<0.02 |
| Mn |
<0.03 |
| Mo |
<0.5 |
| Nb |
<0.5 |
| Ni |
<0.5 |
| P |
<0.5 |
| Pb |
<0.3 |
| Pd |
<0.5 |
| Pt |
<0.5 |
| Rh |
<0.5 |
| Sb |
<1.0 |
| Si |
<0.5 |
| Sn |
<0.3 |
| Sr |
<0.1 |
| Tb |
<0.5 |
| Ti |
<0.2 |
| V |
<0.5 |
| W |
<0.5 |
| Y |
<0.02 |
| Zn |
<0.2 |
|