Acetaldehyde |
NO.92 |
![]() |
Measuring Range |
|
|||
Number of Pump Strokes |
|
|||
Correction Factor |
|
|||
Sampling Time | 2 minutes per pump stroke | |||
Detecting Limit | 2 ppm (n=4) | |||
Colour Change | Yellow → Red | |||
Reaction Principle | 3CH3CHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate |
|||
Coefficient of Variation | 10% (for 10 to 100 ppm), 5% (for 100 to 300 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. |
Substance | Concentration | Interference | Change colour by itself to |
Ammonia | ![]() |
No | |
Acrolein | 3/5 times | + | Red |
Acetone | 2 times | + | Red |
Methyl ethyl ketone | 6 times | + | Red |
MIBK | 10 times | + | Red |
Substance | Correction Factor | No. of pump strokes | Measuring Range |
Diacetyl | by scale | 3 | 25 to 1500 ppm |
Calibration gas generation | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
- | C 25 ppm | 4 to 60% |