N,N-Dimethyl formamide |
NO.183 |
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Measuring Range |
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Number of Pump Strokes |
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Correction Factor |
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Sampling Time | 1.5 minutes per pump stroke | |||
Detecting Limit | 0.1 ppm (n=2) | |||
Colour Change | Pink → Pale red | |||
Reaction Principle | HCON(CH3)2 + NaOH → R-NH2 2R-NH2 + H2SO4 → (R-NH2)2SO4 |
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Coefficient of Variation | 15% (for 2 to 10 ppm), 10% (for 10 to 30 ppm) | |||
Shelf Life | 3 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 |
Amines | + | Pale red | |
Ammomia | + | Pale red | |
Hydrazine | + | Pale red |
Calibration gas generation | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
10 ppm | - | 2.2 to 15.2% |