Hydrogen sulphide + sulphur dioxide |
NO.45H |
| H2S+SO2 |  |
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Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 1 minute per pump stroke | |||
| Detecting Limit | 0.002% (n=10) | |||
| Colour Change | Brown → Pale Yellow | |||
| Reaction Principle | H2S + I2 → 2HI + S SO2 + I2 + H2O → 2HI + H2SO4 |
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| Coefficient of Variation | 10% (for 0.2 to 1 %), 5% (for 1 to 4 %) | |||
| 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 |
| Other Sulphur compounds | + | Pale yellow |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| SO2:2 ppm H2S:1 ppm |
SO2:5 ppm H2S:5 ppm |
H2S:4.0 to 44 % |
