| R-SH |
 |
Performance
| Measuring Range |
| 0.5 to 5 ppm |
5 to 120 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.2 ppm (n=10) |
| Colour Change |
White → Yellow |
| Reaction Principle |
2R SH+ PdSO4 → (RS)2Pd+ H2SO4 |
| Coefficient of Variation |
10% (for 5 to 40 ppm), 5% (for 40 to 120 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| 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 |
2000 ppm |
+ |
Pale brown (whole layer) |
| Hydrogen sulphide |
500 ppm |
+ |
No |
| Acetylene, Ethylene |
2000 ppm |
+ |
Pale brown (whole layer) |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Ethyl mercaptan |
1.0 |
1 to 10 |
0.5 to 120 ppm |
| Isopropyl mercaptan |
2.0 |
1 |
10 to 240 ppm |
| Methyl mercaptan |
0.7 |
1 to 10 |
0.35 to 84 ppm |
| Propyl mercaptan |
4.5 |
1 |
22.5 to 540 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
- |
- |
