| C6H6 |
 |
Performance
| Measuring Range |
| 2.5 to 5 ppm |
5 to 60 ppm |
60 to 120 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.5 ppm (n=4) |
| Colour Change |
White → Dark Green |
| Reaction Principle |
C6H5 + I2O5→ H2S2O7 + I2 |
| Coefficient of Variation |
10% (for 5 to 20 ppm), 5% (for 20 to 60 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 |
| Esters |
2000 ppm |
+ |
No |
| Aromatic HCs |
|
+ |
Dark green |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Diisobutylene |
Factor: 9 |
1 |
45 to 540 ppm |
| α-Pinene |
Factor 19 |
3 |
95 to 1140 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 0.5 ppm |
2.5 ppm |
1.3 to 7.1% |
