Water vapour |
NO.6 |
| H2O |  |
 |
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 | 0.1 mg/L (n=2) | |||
| Colour Change | Yellowish Green → Purple | |||
| Reaction Principle | H2O + Mg(ClO4)2 → Mg(ClO4)2  H2O |
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| Coefficient of Variation | 10% (for 1 to 6 mg/L), 5% (for 6 to 18 mg/L) | |||
| 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 |
| Alcohols, Ketones, Aldehydes, sulphur dioxide, Hydrogen chloride | 2000 ppm | + | No |
| Esters, Acrylonitrile | 5000 ppm | + | No |
| Ammonia | 1000 ppm | + | No |
| Nitrogen dioxide, Hydrogen cyanide |
500 ppm | + | No |
| Hydrogen sulphide | No | No |
| Calibration gas generation | Vaper pressure method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | - | - |
