Methyl Iodide Detection Tubes (100 to 34800 ppm)
Gastec Detection Tube No. 230H measures Methyl Iodide with a Range of 100 to 34800 ppm.
- Measuring Range:
- 100 to 6000 ppm
- 6000 to 15000 ppm
- 15000 to 34800
- Number of Pump Strokes: 2, 1, 1/2
- Correction Factor: 1, 2.5, 5.8
- Sampling Time: 1.5 minutes per pump stroke
- Detecting Limit: 5ppm (2 pump strokes)
- Changes from White to Dark Brown
- Corrections for temperature & humidity: Temperature correction is necessary
- Reaction Principle: CH3I + I2O5 → I2
- Relative Standard Deviation: 5% (for 100 to 6000 ppm)
- 2 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 |
| Carbon monoxide |
≧ 20 ppm |
+ |
Pale brown (pale green at the end of staining) |
| Carbon dioxide |
|
No |
No |
| Ethylene |
|
+ |
Pale yellow |
| Hexane |
|
+ |
Pale orange |
Methyl Iodide Detection Tubes (100 to 34800 ppm)
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