|
TYPICAL
METAL IMPURITIES |
|
HIGH
PURIFIED GRAPHITE
|
|
(All
Grades)
|
|
Element |
Content /
ppm (wt) |
Method |
|
Boron
B |
1.40 |
AP |
|
Sodium
Na |
<0.05 |
ICP-AES |
|
Magnesium
Mg |
<0.02 |
ICP-AES |
|
Alumimum
Al |
0.08 |
ICP-AES |
|
Silicon
Si |
0.70 |
ICP-AES |
|
Potassium
K |
<0.10 |
AAS |
|
Calcium
Ca |
0.04 |
ICP-AES |
|
Titanium
Ti |
0.60 |
ICP-AES |
|
Vanadium
V |
0.23 |
ICP-AES |
|
Chromium
Cr |
<0.07 |
ICP-AES |
|
Manganese
Mn |
<0.03 |
ICP-AES |
|
Iron
Fe |
0.07 |
ICP-AES |
|
Nickel
Ni |
<0.10 |
AAS |
|
Copper
Cu |
<0.08 |
ICP-AES |
|
Total
Ash |
<20 |
Burn Out |
|
|
| ICP-AES : Inductively
Couple Plasma-Atomic Emission Spectrometry
|
| AP
: Absorption
Photometry
|
|
AAS
: Atomic Absorption Spectrometry
|
|
"<"
: shows less than Detection Limit.
|
|
