| N,N-Dimethyl formamide | HCON(CH3)2 | NO.183 |
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| Performance |
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Measuring Range |
0.8 to 2 ppm |
2 to 30 ppm | 30 to 90 ppm |
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Number of Pump Strokes |
2 |
1 | 1/2 |
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Correction Factor |
0.4 |
1 | 3 |
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Sampling Time |
1.5 minutes per pump stroke |
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Detecting Limit |
0.1 ppm (n=2) |
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Color Change |
Pink |
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Reaction Principle |
HCON(CH3)2 + NaOH  R-NH22R-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. | |||
| Possible coexisting substances and their interferences | (NOTE) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Amines |
- |
Plus error |
Pale red |
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Ammomia |
- |
Plus error |
Pale red |
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Hydrazine |
- |
Plus error |
Pale red |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 10ppm | - | 2.2 to 15.2% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |