Gastec 183 Quick-measuring N,N-Dimethyl formamide HCON(CH3)2 (0.8~90ppm)
ManufacturerGastec(View more products from this manufacturer)
Model183
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Indicator: 2 to 30 ppm
Measuring Range:
+ 0.8 to 2 ppm, Number of Pump Strokes 2
+ 2 to 30 ppm, Number of Pump Strokes 1
+ 30 to 90 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Pink → Pale red
Reaction Principle: HCON(CH3)2 + NaOH → R-NH2, 2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation: 15% (for 2 to 10 ppm), 10% (for 10 to 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
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 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. | ||||
Possible coexisting substances and their interferences (NOTE)
| 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% |
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