Water vapour |
NO.6L |
| H2O |  |
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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 | 30 seconds per pump stroke | ||
| Detecting Limit | 0.03 mg/L (n=1) | ||
| Colour Change | Yellow → Purple | ||
| Reaction Principle | H2O + Mg(ClO4)2 → Mg(ClO4)2  H2O |
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| Coefficient of Variation | 10% (for 0.05 to 0.2 mg/L), 5% (for 0.2 to 1 mg/L) | ||
| 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 |
| Alcohols | Unclear demarcation | Purple (whole layer) | |
| Aldehydes | Unclear demarcation | Purple (whole layer) | |
| Ketones | Unclear demarcation | Purple (whole layer) | |
| Nitriles | Unclear demarcation | Purple (whole layer) | |
| Hydrocarbons | No | No | |
| Nitrogen dioxide | No | No | |
| Sulphur dioxide | 100 ppm | + | No |
| Ammonia | 10 ppm | Unclear demarcation | Yellowish green |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | - | - |
