Indicator: 10 to 100 ppm
Measuring Range:
+ 5 to 10 ppm, Number of Pump Strokes 4
+ 10 to 100 ppm, Number of Pump Strokes 2
+ 100 to 250 ppm, Number of Pump Strokes 1
Sampling Time: 30 seconds per pump stroke
Colour Change: White → Brown
Reaction Principle: CH3CO2CH:CH2+C6H3(CH3)3+ H2S2O7 → Condensation Polymer (Brown)
Coefficient of Variation: 15% (for 10 to 20 ppm), 10% (for 20 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 250 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
30 seconds per pump stroke |
| Detecting Limit |
1 ppm (n=4) |
| Colour Change |
White → Brown |
| Reaction Principle |
CH3CO2CH:CH2+C6H3(CH3)3+ H2S2O7 → Condensation Polymer (Brown) |
| Coefficient of Variation |
15% (for 10 to 20 ppm), 10% (for 20 to 100 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Aldehydes |
|
+ |
Brown |
| Ketones |
|
+ |
Brown |
| Ethylene |
≧ 1000 ppm |
+ |
Yellow |
| Vinyl chloride |
≧ 500 ppm |
+ |
Yellow |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 10 ppm |
15 ppm |
2.6 to 13.4% |
