| C4H10 |
 |
Performance
| Measuring Range |
25 to 1400 ppm |
| Number of Pump Strokes |
1 |
| Correction Factor |
1 |
| Sampling Time |
4 minutes per pump stroke |
| Detecting Limit |
5 ppm (n=1) |
| Colour Change |
Orange → Dark Green |
| Reaction Principle |
C4H10 + Cr6++ H2SO4 → Cr3+ |
| Coefficient of Variation |
10% (for 25 to 400 ppm), 5% (for 400 to 1400 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Organic solvents |
|
+ |
Dark green |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Isobutane |
Factor : 2.2 |
1 |
55 to 3080 ppm |
| Pentane |
Factor : 1.2 |
1 |
30 to 1680 ppm |
| Calibration gas generation |
Static gas dilution method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 800 ppm |
- |
1.6 to 8.5% |
