Indicator: 10 ~ 200 ppm
Measuring Range: 10 ~ 200 ppm , Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Pale blue
Reaction Principle: CH3CO2(CH2)4CH3 + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 15% (for 10 to 50 ppm), 10% (for 50 to 200 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
10 to 200 ppm |
| Number of Pump Strokes |
2 |
| Correction Factor |
1 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
2 ppm (n=2) |
| Colour Change |
Yellow → Pale blue |
| Reaction Principle |
CH3CO2(CH2)4CH3 + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
15% (for 10 to 50 ppm), 10% (for 50 to 200 ppm) |
| Shelf Life |
2 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 |
| Alcohols |
|
+ |
Pale blue |
| Ketones |
|
+ |
Pale blue |
| Esters |
|
+ |
Pale blue |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 50 ppm(2014) |
100 ppm(2014) |
1.1 to 7.5% |
