CH3SH |
![](/files/images/icons/arrow_left_48.png) |
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% |