Indicator: 2 to 30 ppm
Measuring Range:
+ 0.8 to 2 ppm, Number of Pump Strokes 2
+ 2 to 30 ppm, Number of Pump Strokes 1
+ 30 to 90 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Pink → Pale red
Reaction Principle: HCON(CH3)2 + NaOH → R-NH2, 2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation: 15% (for 2 to 10 ppm), 10% (for 10 to 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.8 to 2 ppm |
2 to 30 ppm |
30 to 90 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.1 ppm (n=2) |
| Colour Change |
Pink → Pale red |
| Reaction Principle |
HCON(CH3)2 + NaOH → R-NH2
2R-NH2 + H2SO4 → (R-NH2)2SO4 |
| Coefficient of Variation |
15% (for 2 to 10 ppm), 10% (for 10 to 30 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 |
| Amines |
|
+ |
Pale red |
| Ammomia |
|
+ |
Pale red |
| Hydrazine |
|
+ |
Pale red |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 10 ppm |
- |
2.2 to 15.2% |
