| Vinylidene chloride | CH2:CCl2 | NO.130L |
|
|
||
| Performance |
|
Measuring Range |
0.4 to 1 ppm |
1 to 14 ppm |
14 to 40.6 ppm |
|
Number of Pump Strokes |
2 |
1 |
1/2 |
|
Correction Factor |
0.4 |
1 |
2.9 |
|
Sampling Time |
1 minute per pump stroke |
||
|
Detecting Limit |
0.1 ppm (n=2) |
||
|
Color Change |
Yellow |
||
|
Reaction Principle |
Vinylidene chloride is oxidized to form hydrogen |
||
| Coefficient of Variation | 10% (for 1 to 4 ppm), 5% (for 4 to 14 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 color by itself |
|
Ethylene |
300ppm |
Minus error |
No discoloration |
|
Vinyl chloride |
1/7 time |
Plus error |
Produce reddish brown |
|
Tetrachloroethylene |
4 times |
Plus error |
Produce reddish brown |
|
Trichloroethylene |
1time |
Plus error |
Produce reddish brown |
|
Toluene |
500 ppm |
Minus error |
No discoloration |
|
Benzene |
400 ppm |
Minus error |
No discoloration |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 5ppm | - | 5.6 to 11.4% |
|
|
| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Reddish brown