| Composition |
Test Method |
Value, typical |
Technique |
| Ethylene, purity, mol% |
By calculation |
99.95 mini |
100-(∑impurities) |
| Methane + Ethane, ppm vol |
ASTM D6159 |
<500 |
GC/FID |
| Acetylene, ppm vol |
ASTM D6159 |
<1 |
GC/FID |
| C3⁺, ppm vol |
ASTM D6159 |
<10 |
GC/FID |
| Hydrogen, ppm vol |
ASTM D2504 |
<5 |
GC/TCD |
| Carbon monoxide, ppm vol |
ASTM D2504 |
<0.1 |
GC/methanizer/FID |
| Carbon dioxide, ppm vol |
ASTM D2504 |
<0.1 |
GC/methanizer/FID |
| Oxygen, ppm vol |
/ |
<0.1 |
Field testing portable oxygen meter |
| Sulfur, combined, total, ppm vol |
ASTM D6667 |
<0.5 |
UV-fluorescence analyzer |
| Methanol, ppm vol |
/ |
<0.5 |
GC/FID |
| Oxygenated compounds,ppm vol |
/ |
<0.5 |
GC/FID |
| Nitrogen, combined, total, ppm vol |
ASTM D6429 |
<0.2 |
Chemiluminescence analyzer |
| Carbonyl sulfide, ppm vol |
ASTM D6228 |
<0.02 |
GC/FID |
| Mercaptans, ppm vol |
ASTM D6228 |
<0.3 |
GC/FID |
| Moisture, ppm vol |
ASTM D5454 |
<0.1 |
Field testing portable water dew point meter |