| (CH3)2CHCH2COCH3 |
 |
Performance
| Measuring Range |
0.05 to 0.6% |
| Number of Pump Strokes |
2 |
| Correction Factor |
1 |
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.001% (n=2) |
| Colour Change |
Orange →Dark green |
| Reaction Principle |
(CH3)2CHCH2COCH3+ Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
10% (for 0.05 to 0.2 %), 5% (for 0.2 to 0.6 %) |
| 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% |
+ |
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 |
| Styrene |
1.5 |
1 |
0.075 to 0.9% |
| Calibration gas generation |
Static gas dilution method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 20 ppm |
75 ppm |
1.2 to 8% |
