| CH3CO2C2H5 |
 |
Performance
| Measuring Range |
0.1 to 1.5% |
| Number of Pump Strokes |
1 |
| Correction Factor |
1 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.01% (n=1) |
| Colour Change |
Orange → Dark green |
| Reaction Principle |
CH3CO2C2H5 + Cr6+ H2SO4 → Cr3+ |
| Coefficient of Variation |
10% (for 0.04 to 0.3 %), 5% (for 0.3 to 1.5 %) |
| 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 |
| Vinyl acetate |
Factor: 0.6 |
1 |
0.02 to 0.9% |
| Calibration gas generation |
Static gas dilution method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 400 ppm |
- |
2 to 11.5% |
