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You are Here: » Short
Term Tubes » D, E & P » 163 |
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Ethylene oxide |
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NO.163 |
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C2H4O |
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Performance |
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Measuring Range |
(0.05 ) to 3% |
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Number of Pump
Strokes |
1 |
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Correction Factor |
1 |
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Sampling Time |
1
minute per pump
stroke |
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Detecting Limit |
0.02% (n = 1) |
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Colour Change |
Orange → Green |
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Reaction Principle |
C2H4O+
Cr6+ + H2SO4
→ Cr3+ |
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Coefficient of
Variation |
10% (for 0.05 to 1.0
%), 5% (for 1.0 to
3.0 %) |
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Shelf Life |
3
Years |
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Corrections for
temperature &
humidity |
Unnecessary |
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Store the tubes at
cool and dark place. |
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Possible coexisting substances and
their interferences
(NOTE) |
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Substance |
Concentration |
Interference |
Change colour by itself to |
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Aromatic HCs |
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+ |
Green |
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Alcohols, Esters,
Ethers |
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+ |
Green |
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Other substance measurable with this
detector tube |
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Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
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1,4-Dioxane |
Factor: 2.0 |
1 |
0.1 to 6% |
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Propylene oxide |
Factor: 1.3 |
1 |
0.065 to 3.9% |
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Calibration gas generation |
Static gas dilution method |
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TLV-TWA |
TLV-STEL |
Explosive range |
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1 ppm |
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3.6 to 100% |
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Gastec Tubes and
Sampling Pump
