| CH3SH |
 |
Performance
| Measuring Range |
| 20 to 50 ppm |
50 to 1000 ppm |
1000 to 2700 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
2 ppm (n=2) |
| Colour Change |
White → Yellow |
| Reaction Principle |
2CH3SH + PdSO4 → (CH3S)2Pd + H2SO4 |
| Coefficient of Variation |
10% (for 50 to 200 ppm), 5% (for 200 to 1000 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Carbon monoxide |
|
No |
No |
| Nitrogen dioxide |
|
No |
No |
| Hydrogen sulphide |
1000 ppm |
+ |
No |
| Ethylene |
|
No |
No |
| Mercaptans |
|
+ |
Yellow |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Ethyl mercaptan |
by scale |
1 |
100 to 3800 ppm |
| Calibration gas generation |
Static gas dilution method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 0.5 ppm |
- |
3.9 to 21.8% |
