Indicator: 5 to 60 ppm
Measuring Range:
+ 1.5 to 5 ppm, Number of Pump Strokes 4
+ 5 to 60 ppm, Number of Pump Strokes 2
+ 60 to 240 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Pink → Pale yellow
Reaction Principle:
+ CH3CON(CH3)2 + NaOH → R-NH2
+ 2R-NH2 + H2SO4 → (R-NH2)2SO4
Coefficient of Variation: 15% (for 5 to 20 ppm), 10% (for 20 to 60 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 1.5 to 5 ppm |
5 to 60 ppm |
60 to 240 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.5 ppm (n=4) |
| Colour Change |
Pink → Pale yellow |
| Reaction Principle |
CH3CON(CH3)2 + NaOH → R-NH2
2R-NH2 + H2SO4 → (R-NH2)2SO4 |
| Coefficient of Variation |
15% (for 5 to 20 ppm), 10% (for 20 to 60 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 yellow |
| Ammomia |
|
+ |
Pale yellow |
| Hydrazine |
|
+ |
Pale yellow |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 10 ppm(2014) |
- |
- |
