Methyl isobutyl ketone |
NO.153L |
| (CH3)2CHCH2COCH3 |  |
 |
Performance
| Measuring Range | 2.5 to 50ppm | 50 to 130ppm |
| Number of Pump Strokes | 1 | 1/2 |
| Correction Factor | 1 | 2.6 |
| Sampling Time | 2 minutes per pump stroke | |
| Detecting Limit | 1.5ppm (n=1) | |
| Colour Change | Pale yellow → Pale blue | |
| Reaction Principle | (CH3)2CHCH2COCH3+ Cr6+ + H3PO4 → Cr3+ | |
| Coefficient of Variation | 10% (for 2.5 to 10ppm), 5% (for 10 to 50ppm) | |
| Shelf Life | 1 Year | |
| 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 |
| Acrolein |  5 ppm |
No | Pale blue（ 20 ppm） |
| Acetone | No | No | |
| Acetic acid | No | No | |
| Ethyl acetate | 5ppm |
+ | Pale blue |
| Diethyl ether | + | Pale blue | |
| Toluene | 5ppm |
+ | White |
| Halogenated hydrocarbons | No | No | |
| Hexane | 15ppm |
+ | White（15 ppm） |
| Benzene | No | No | |
| Methanol | 5ppm |
+ | Pale blue（10 ppm） |
| Methyl ethyl ketone | 5ppm |
+ | White（5 ppm） |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 50 ppm | 75 ppm | 1.2 to 8% |
