Tetrahydrothiophene |
NO.76H |
Measuring Range | 10 to 200 ppm |
Number of Pump Strokes | 1 |
Correction Factor | 1 |
Sampling Time | 1.5 minutes per pump stroke |
Detecting Limit | 2 ppm (n=1) |
Colour Change | Pink → Pale Yellow |
Reaction Principle | C4H8S + MnO4 (Pink) → Pale Yellow Product |
Coefficient of Variation | 10% (for 10 to 60 ppm), 5% (for 80 to 200 ppm) |
Shelf Life | 2 Years |
Corrections for temperature & humidity | Temperature correction is necessary |
Store the tubes at cool and dark place. |
Substance | Concentration | Interference | Change colour by itself to |
Ethyl mercaptan | 3 ppm | No | Pale pink (whole layer) |
Ethylene | 5000 ppm | No | Pale pink (whole layer) |
Propylene | 2000 ppm | No | Pale pink (whole layer) |
Methanol | 2000 ppm | No | Pale pink (whole layer) |
Hydrogen sulphide | 300 ppm | No | Pale pink (whole layer) |
Calibration gas generation | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
- | - | - |