| CH2FCHC |
 |
Performance
| Measuring Range |
| 0.25 to 0.5 ppm |
0.5 to
1 ppm |
1 to 20 ppm |
20 to 54 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.05 ppm (n=4) |
| Colour Change |
Yellow → Reddish brown |
| Reaction Principle |
CH2:CHCl + Cr6+ + H2SO4 → HCl
HCl+ Base → Chlorides |
| Coefficient of Variation |
10% (for 1 to 6 ppm), 5% (for 6 to 20 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Ethylene |
0.1% |
 |
No |
| Tetrachloroethylene |
3 times |
+ |
Reddish brown |
| Trichloroethylene |
1/2 time |
+ |
Reddish brown |
| Toluene, Xylene |
500 ppm |
|
No |
| Benzene |
400 ppm |
|
No |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| 1,3-Dichloropropane |
Factor: 0.5 |
2 |
0.5 to 10 ppm |
| p-Ethyl benzylchloride |
Factor: 2.5 |
2 |
2.5 to 50 ppm |
| Ethyl chloroformate |
Factor: 7 |
2 |
7 to 140 ppm |
| 2-Methyl allyl chloride |
Factor: 2.75 |
1 |
2.8 to 55 ppm |
| Methyl chloroformate |
Factor: 58 |
5 |
58 to 1160 ppm |
| Propylene dichloride |
Factor: 40 |
2 |
40 to 800 ppm |
| 1,2,4-Trichlorobenzene |
Factor: 0.65 |
4 |
0.65 to 13 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm |
- |
3.6 to 23% |
