Indicator: 10 to 100 ppm
Measuring Range:
+ 5 to 10 ppm, Number of Pump Strokes 2
+ 10 to 100 ppm, Number of Pump Strokes 1
+ 100 to 200 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minute per pump stroke
Colour Change: Blue → Yellow
Reaction Principle:
- COS + I2O5 + H2SO4 → SO2 + CO2
- SO2 + BaCl2 + H2O → BaSO3+ 2HCl
- HCl + Base → Chloride
Coefficient of Variation: 10% (for 10 to 30 ppm), 5% (for 30 to 100 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 5 to 10 ppm |
10 to 100 ppm |
100 to 200 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
1 ppm (n=2) |
| Colour Change |
Blue → Yellow |
| Reaction Principle |
COS + I2O5 + H2SO4 → SO2 + CO2
SO2 + BaCl2 + H2O → BaSO3+ 2HCl
HCl + Base → Chloride |
| Coefficient of Variation |
10% (for 10 to 30 ppm), 5% (for 30 to 100 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 |
| Carbon disulphide |
|
+ |
Yellow |
| sulphur dioxide |
|
+ |
Yellow |
| Butane |
5000 ppm |
 |
No |
| Propane |
5000 ppm |
|
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 5ppm(2014) |
- |
12 to 19% |
