Gastec 93 Quick-measuring Detector tubes Acrolein CH2：CHCHO (3.3~800ppm)
ManufacturerGastec(View more products from this manufacturer)
Model93
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Indicator: 10 to 800 ppm
Measuring Range:
+ 3.3 to 10 ppm, Number of Pump Strokes 4
+ 10 to 800 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 3CH2CHCHO + (NH2OH)3 • H3PO4 → H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (for 10 to 200 ppm), 5% (for 200 to 800 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 | 2 minutes per pump stroke | ||
| Detecting Limit | 2 ppm (n=4) | ||
| Colour Change | Yellow → Red | ||
| Reaction Principle | 3CH2CHCHO + (NH2OH)3 • H3PO4 → H3PO4 + Base → Phosphate |
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| Coefficient of Variation | 10% (for 10 to 200 ppm), 5% (for 200 to 800 ppm) | ||
| Shelf Life | 2 Years | ||
| Corrections for temperature & humidity | Temperature correction is necessary | ||
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below | |||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Ammonia | No | ||
| sulphur dioxide | 1/5 time | + | No |
| Acetaldehyde | 1/5 time | + | Red |
| Acetone | 1 time | + | Red |
| Methyl Ethyl Ketone | 3 times | + | Red |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | C 0.1 ppm | 2.8 to 31% |
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