This is a listing of trace impurities in some of our coverslips and slides.
Trace Impurities
ELEMENT | ELECTRICALLY FUSED | ELECTRICALLY FUSED INGOT | FLAME FUSED | FUSED SILICA |
Ag | — | — | — | <2ppm |
Al | 14ppm | 14ppm | 15ppm | <25ppm |
As | <.002ppm | <.002ppm | — | <15ppm |
Au | — | — | — | <1ppm |
B | <0.2ppm | <0.2ppm | — | <10ppm |
Ba | — | — | — | <1ppm |
Be | — | — | — | <0.5ppm |
Bi | — | — | — | <0ppm |
Ca | 0.4ppm | 0.4ppm | 0.5ppm | <15ppm |
Cd | <0.01ppm | <0.01ppm | — | <0.3ppm |
Co | — | — | — | <0.5ppm |
Cr | <0.05ppm | 0.05ppm | <0.01 | <1ppm |
Cu | <0.05ppm | <0.05ppm | <0.01 | <2ppm |
Fe | 0.2ppm | 0.2ppm | 0.1ppm | <20ppm |
Ga | — | — | — | <0.5ppm |
K | 0.6ppm | 0.6ppm | 0.2ppm | <5ppm |
Li | 0.6ppm | 0.6ppm | 0.2ppm | <7.2ppm |
Mg | 0.1ppm | 0.1ppm | — | <5ppm |
Mn | <0.05ppm | <0.05ppm | 0.01ppm | <1ppm |
Mo | — | — | — | <1ppm |
Na | 0.7ppm | 0.7ppm | 0.1ppm | <187ppm |
Nd | — | — | 0.1ppm | — |
Ni | <0.1ppm | <0.1ppm | — | <5ppm |
P | <0.2ppm | <0.2ppm | — | <50ppm |
Sb | <0.003ppm | <0.003ppm | — | <0.5ppm |
Sr | — | — | — | <0.5ppm |
Th | — | — | — | <0.5ppm |
Ti | 1.1ppm | 1.1ppm | 1.3ppm | <10ppm |
U | — | — | — | <1ppm |
V | — | — | — | <1ppm |
Y | — | — | <0.1ppm | — |
Zn | — | — | — | <5ppm |
Zr | 0.8ppm | 0.8 | 1.3ppm | <5ppm |
OH | <5ppm | <5ppm | 170ppm | <1000ppm |
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