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Indicator: 10 to 100 ppm
Measuring Range:
+ 5 to 10 ppm, Number of Pump Strokes 2
+ 10 to 100 ppm, Number of Pump Strokes 1
+ 100 to 200 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minute per pump stroke
Colour Change: Blue → Yellow
Reaction Principle:
- COS + I2O5 + H2SO4 → SO2 + CO2
- SO2 + BaCl2 + H2O → BaSO3+ 2HCl
- HCl + Base → Chloride
Coefficient of Variation: 10% (for 10 to 30 ppm), 5% (for 30 to 100 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 3 minutes per pump stroke | |||
| Detecting Limit | 1 ppm (n=2) | |||
| Colour Change | Blue → Yellow | |||
| Reaction Principle | COS + I2O5 + H2SO4 → SO2 + CO2 SO2 + BaCl2 + H2O → BaSO3+ 2HCl HCl + Base → Chloride |
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| Coefficient of Variation | 10% (for 10 to 30 ppm), 5% (for 30 to 100 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity | Unnecessary | |||
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | ||||
| Substance | Concentration | Interference | Change colour by itself to |
| Carbon disulphide | + | Yellow | |
| sulphur dioxide | + | Yellow | |
| Butane | 5000 ppm |  |
No |
| Propane | 5000 ppm | |
No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5ppm(2014) | - | 12 to 19% |
