Indicator: 2 to 12 ppm
Measuring Range:
+ 0.5 to 2 ppm, Number of Pump Strokes 4
+ 2 to 12 ppm, Number of Pump Strokes 2
+ 12 to 30 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: White → Pale purple
Reaction Principle: CHCl3 + I2O5 + H2S2O7 → Cl2, Cl2 + (CH3C10H5NH2)2→ Pale purple products
Coefficient of Variation: 10% (for 2 to 4 ppm), 5% (for 4 to 12 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.5 to 2 ppm |
2 to 12 ppm |
12 to 30 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.2 ppm (n=4) |
| Colour Change |
White → Pale purple |
| Reaction Principle |
CHCl3 + I2O5 + H2S2O7 → Cl2
Cl2 + (CH3C10H5NH2)2→ Pale purple products |
| Coefficient of Variation |
10% (for 2 to 4 ppm), 5% (for 4 to 12 ppm) |
| Shelf Life |
1 Year |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| 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 |
| Chlorine |
|
No |
No |
| Bromine |
|
No |
No |
| Iodine |
|
No |
No |
| Unsaturated halogenated HCs |
|
+ |
Pale purple |
| Saturated halogenated HCs |
|
+ |
Pale purple |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 10 ppm |
- |
- |
