Indicator: 0.2 to 50 ppm
Measuring Range:
+ 0.2 to 50 ppm, Number of Pump Strokes 4
+ 50 to 100 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Pale yellow → Blue
Reaction Principle: CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue
Coefficient of Variation: 10% (for 0.2 to 10 ppm), 5% (for 10 to 50 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
0.2 to 50 ppm |
50 to 100 ppm |
| Number of Pump Strokes |
4 |
2 |
| Correction Factor |
1 |
2 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.05 ppm (n=4) |
| Colour Change |
Pale yellow → Blue |
| Reaction Principle |
CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue |
| Coefficient of Variation |
10% (for 0.2 to 10 ppm), 5% (for 10 to 50 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 |
| Ammonia, Hydrogen cyanide |
|
+ |
White |
| Carbon monoxide, Hydrogen |
|
+ |
Blue (whole layer) |
| Hydrogen chloride |
|
+ |
Pink |
| Hydrogen sulphide |
|
+ |
Black |
| Butadiene |
|
+ |
White |
| Butane, Pentane |
|
+ |
Blue (whole layer) |
| Butylene, Propylene |
1/4 time |
+ |
Blue |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 200ppm(2014) |
- |
2.7 to 36% |
