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四氢呋喃气体检测管159 Tetrahydrofuran,Measuring Range 20 to 50 ppm 50 to 800 ppm Number of Pump Strokes 2 1 Correction Factor四氢呋喃气体检测管159 Tetrahydrofuran C6H8O
详情介绍:
四氢呋喃气体检测管159 Tetrahydrofuran
Tetrahydrofuran No.159
C6H8O
Performance |
MeasuringRange | 20 to 50 ppm | 50 to 800 ppm |
Number of PumpStrokes | 2 | 1 |
CorrectionFactor | 0.4 | 1 |
SamplingTime | 5 minutes per pumpstroke | |
DetectingLimit | 2 ppm (n=2) | |
ColorChange | Pink → PaleBlue | |
ReactionPrinciple | C4H8O + Cr6+ + H2SO4 → Cr3+ | |
Coefficient ofVariation | 15% (for50 to 200 ppm), 10% (for 200 to 800 ppm) | |
ShelfLife | 3Years | |
Correctionsfor temperature & humidity | Temperature correction is necessary | |
Store the tubes at cool and darkplace. |
Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Alcohols | - | Plus error | Produces pale bluestain. |
Othersubstance measurable with this detector tube |
Substance | Correction Factor | Pump Strokes | Measuring Range |
1.4-Dioxane | by scale | 2 | 25to 140ppm |
Calibration gasgeneration | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
200ppm | 250ppm | 1.5to 12.4% |