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
Detail
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% |