Methyl ethyl ketone |
NO.152L |
| CH3COC2H5 |  |
 |
Performance
| Measuring Range | 10 to 120ppm | 120 to 384ppm |
| Number of Pump Strokes | 1 | 1/2 |
| Correction Factor | 1 | 3.2 |
| Sampling Time | 2 minutes per pump stroke | |
| Detecting Limit | 3ppm (n=1) | |
| Colour Change | Yellow → Reddish purple | |
| Reaction Principle | 3CH3COC2H5 + (NH2OH)3 H3PO4 → H3PO4 | |
| Coefficient of Variation | 5% (for 10 to 120ppm) | |
| 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 |
| Acetaldehyde | + | Reddish purple | |
| Acetone | + | Reddish purple | |
| Acetic acid | No | No | |
| Ethyl acetate | + | No | |
| Diethyl ether |  20 ppm |
+ | No |
| Trichloroethylene | No | No | |
| Toluene | No | No | |
| Hexane | No | No | |
| Methanol | 50 ppm |
+ | No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 200 ppm | 300 ppm | 1.7 to 11.4% |
