| C6H4Cl2 |
 |
Performance
| Measuring Range |
2.5 to 300 ppm |
| Number of Pump Strokes |
2 |
| Correction Factor |
1 |
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
1 ppm (n=2) |
| Colour Change |
White → Light brown |
| Reaction Principle |
C6H4Cl2 + I2O5 + Cr6+ + H2S2O7 → I2 |
| Coefficient of Variation |
10% (for 2.5 to 10 ppm), 5% (for 30 to 300 ppm) |
| 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 |
| Aromatic hydrocarbons |
|
+ |
Light brown |
| Acetylene |
0.2% |
+ |
Light brown
( whole layer) |
| Carbon monoxide |
0.1% |
+ |
| Ethylene, Esters |
0.2% |
+ |
| Hexane |
0.2% |
+ |
| Alcohols, Ketones |
1% |
+ |
No |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| m-Dichlorobenzene |
1.0 |
2 |
2.5 to 300 ppm |
| p-Dichlorobenzene |
1.0 |
2 |
2.5 to 300 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
50 ppm |
2.2 to 12% |
