| CH3CO2H |
 |
Performance
| Measuring Range |
| 1 to 2 ppm |
2 to 50 ppm |
50 to 100 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.2 ppm (n=2) |
| Colour Change |
Pink → Yellow |
| Reaction Principle |
CH3CO2H + Base → Reaction product |
| Coefficient of Variation |
10% (for 2 to 10 ppm), 5% (for 10 to 50 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Humidity 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 |
| Hydrogen chloride, Hydrogen cyanide,Nitric acid |
3 times or higher |
+ |
Yellow |
| Chlorine, sulphur dioxide, Nitrogen dioxide |
1/2 times or higher |
+ |
Yellow |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Acetic anhydride |
Factor: 0.3 |
1 |
0.6 to 15 ppm |
| Acrylic acid |
Factor: 1.0 |
1 |
2 to 50 ppm |
| Formic acid |
Factor: 2.6 |
1 |
5.2 to 130 ppm |
| Isovalenic acid |
Factor: 1.0 |
1 |
2 to 50 ppm |
| Maleic anhydride |
Factor: 0.4 |
1 |
0.8 to 20 ppm |
| Methacrylic acid |
Factor: 0.9 |
1 |
1.8 to 45 ppm |
| Propionic acid |
Factor: 1.5 |
1 |
3to 75 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 10 ppm |
15 ppm |
- |
