Methanol Detection Tubes (20 to 1000 ppm)
Gastec Detection Tube No. 111L measures Methanol with a Range of 20 to 1000 ppm.
- Measuring Range: 20 to 40 ppm, 40 to 1000 ppm
- Number of Pump Strokes: 2, 1
- Correction Factor: 1/2, 1
- Sampling Time: 2 minutes per pump stroke
- Detecting Limit: 15 ppm (2 pump strokes)
- Reaction Principle: CH3OH + Cr6+ + H2SO4 → Cr3+
- Coefficient of Variation: 15% (for 40 to 200 ppm), 10% (for 200 to 1000 ppm)
- Changes from Pale vermilion to Pale Blue
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Alcohols |
|
+ |
Pale blue |
| Acetone |
≧ 1000 ppm |
+ |
No (≦ 1000 ppm) |
| Ethyl acetate |
≦ 500 ppm |
No |
No (≦ 500 ppm) |
| Toluene |
≦ 300 ppm |
No |
No (≦ 300 ppm) |
| Benzene |
≦ 70 ppm |
No |
No |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No. of Pump Strokes: |
Measuring Range: |
Ethylene Chlorohydrine
|
by scale |
3 |
80 to 200 ppm |
Methanol Detection Tubes (20 to 1000 ppm)
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