Trace  Inpurities Category

TRACE IMPURITIES


ELEMENT
(PPM)

ELECTRICALLY FUSED
TUBING & ROD
(PPM)

ELECTRICALLY FUSED
INGOT
(PPM)

FLAME FUSED
INGOT
(PPM)

FUSED SILICA
FLAME FUSED
(PPB)

Ag
<2
Al
14 14 15 <25
As
<.002 <.002 <15
Au
<1
B
<0.2 <0.2 <10
Ba
<1
Be
<0.5
Bi
<0
Ca
0.4 0.4 0.5 <15
Cd
<0.01 <0.01 <0.3
Co
<0.5
Cr
<0.05 0.05 <0.01 <1
Cu
<0.05 <0.05 <0.01 <2
Fe
0.2 0.2 0.1 <20
Ga
<0.5
K
0.6 0.6 0.2 <5
Li
0.6 0.6 0.2 <7.2
Mg
0.1 0.1 <5
Mn
<0.05 <0.05 0.01 <1
Mo
<1
Na
0.7 0.7 0.1 <187
Nd
0.1
Ni
<0.1 <0.1 <5
P
<0.2 <0.2 <50
Sb
<0.003 <0.003 <0.5
Sr
<0.5
Th
<0.5
Ti
1.1 1.1 1.3 <10
U
<1
V
<1
Y
<0.1
Zn
<5
Zr
0.8 0.8 1.3 <5
OH
<5 <5 170 <1000 PPM
         



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