Indicator: 0.25 to 5 ppm
Measuring Range:
+ 0.25 to 5 ppm, Number of Pump Strokes 2
+ 5 to 11 ppm, Number of Pump Strokes 1
Sampling Time: 2 minutes per pump stroke
Colour Change: White → Yellow
Reaction Principle:
+ CCl4 + I2O5 + H2S2O7 → COCl2,
+ COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4CHCl2 + CO2,
+ (CH3)2NC6H4CHCl2 + (C6H5)2NH(White) → Reaction product (Yellow)
Coefficient of Variation: 10% (for 0.25 to 1 ppm), 5% (for 1 to 5 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.25 to 5 ppm |
5 to 11 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.04 ppm (n=2) |
| Colour Change |
White → Yellow |
| Reaction Principle |
CCl4 + I2O5 + H2S2O7 → COCl2
COCl2 + (CH3)2NC6 H4CHO→ (CH3)2NC6 H4CHCl2 + CO2
(CH3)2NC6H4CHCl2 + (C6H5)2NH(White) → Reaction product (Yellow)
|
| Coefficient of Variation |
10% (for 0.25 to 1 ppm), 5% (for 1 to 5 ppm) |
| Shelf Life |
1 Year |
| 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 |
| Hydrogen chloride |
|
No |
No |
| Chlorine, Bromine |
 3/10 |
+ |
No( 0.4ppm) |
| Methyl bromide |
2.5times |
+ |
Pale yellow (2.5ppm) |
| 1,1,1-Trichloroethane |
14 ppm |
+ |
No(17ppm) |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Chloropicrin |
1.1 |
2 |
0.28 to 5.5 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 5 ppm(2015) |
10 ppm(2015) |
- |
