| CH3COCH3 |
 |
Performance
| Measuring Range |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.003% (n=2) |
| Colour Change |
Orange → Dark green |
| Reaction Principle |
CH3COCH3 + K2Cr2O7 + H2SO4 + H2O → Cr2(SO4)3 |
| Coefficient of Variation |
10% (for 0.01 to 0.2 %), 5% (for 0.2 to 0.8 %) |
| 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 |
| sulphur dioxide |
500 ppm |
+ |
Green |
| Hydrogen sulphide |
500 ppm |
+ |
Dark green |
| Alcohols, Esters, Ketones |
|
+ |
Dark green |
| Propane |
0.2% |
Yes |
Dark green (whole layer) |
| Aromatic HCs. |
500 ppm |
+ |
Dark green |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Cyclohexene |
1.0 |
1 |
0.05 to 0.8% |
| Calibration gas generation |
Static gas dilution method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 500 ppm |
750 ppm |
2.1 to 13% |
