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丙烯腈气体检测管191 Acrylonitrile
Acrylonitrile No.191
CH2:CHCN
| Performance |
MeasuringRange | 2 to 5 ppm | 5 to 120 ppm | 120 to 360 ppm |
Number of PumpStroke | 4 | 2 | 1 |
CorrectionFactor | 0.4 | 1 | 3 |
Sampling Time | 1 minute per pumpstroke | ||
Detecting Limit | 1 ppm (n=4) | ||
Color Change | Yellow → Red | ||
Reaction Principle | Pretreatment tube:CH2:CHCN + Cr6+ +H2SO4 →HCN | ||
| Coefficient ofVariation | 10% (for5 to 40 ppm), 5% (for 40 to 120 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 |
Nitriles (C3) | 10ppm | Plus error | Discolors redstain |
Acetonecyanohidrin | 10ppm | Plus error | Discolors redstain |
Alcohols, Esters,Ketones | - | - | Nodiscoloration |
Aromatichydrocarbons | - | - | Nodiscoloration |
Hydrogenchloride, | - | - | Nodiscoloration |
| Othersubstance measurable with this detector tube |
Substance | Correction Factor | Pump Strokes | Measuring Range |
Propionnitrile | 1.0 | 4 | 50 to120% |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | - | 3 to17% |