Methyl Iodide Detection Tubes (0.5 to 108 ppm)

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Item #: 230
MFG: GasTec
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
$88.15 Was: $100.29
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Product Details

Methyl Iodide Detection Tubes (0.5 to 108 ppm)

Gastec Detection Tube No. 230 measures Methyl Iodide with a Range of 0.5 to 108 ppm.

  • Measuring Range:
    • 0.5 to 1 ppm
    • (1) to 20 ppm
    • 20 to 46 ppm
    • 46 to 108 ppm
  • Number of Pump Strokes: 4, 2, 1, 1/2
  • Correction Factor: 0.5, 1, 2.3, 5.4
  • Sampling Time: 1.5 minutes per pump stroke
  • Detecting Limit: 0.2 ppm (4 pump strokes)
  • Changes from White to Gray
  • Corrections for temperature & humidity: Temperature correction is necessary
  • Reaction Principle:
    • CH3I + I2O5 + V2O5 + H2SO4 → I2
    • I2 + 3,3',5,5'-Tetramethylbenzidine → Reaction Product
  • Relative Standard Deviation: 5% (for 1 to 20 ppm)
  • 2 Year Shelf Life (in the refrigerator)
  • Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.

Possible coexisting substances and their interferences:

Substance Concentration Interference Changes color by itself to
Chlorine ≧ 1/1 + (Two Layers) Brown (turns pale blue after a few minutes)
Nitrogen dioxide ≧ 1/1 - (Two Layers) Pink
Methyl bromide ≦ 30 ppm No No
Dichloromethane ≦ 50 ppm No No
Carbon dioxide ≦ 1 % No No

Methyl Iodide Detection Tubes (0.5 to 108 ppm)

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