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简单介绍：
2-戊烯腈检测管193 2-Pentenenitrile CH3CH2CH:CHCN，Measuring Range 0.5 to 6.0 ppm 6.0 to 15 ppm，目前常用的有检测氨气、有机磷农药、一氧化碳、光气、氢氰酸、硫化氢、甲醛、乙醛、二氧化氮、次氯酸、过氧化氢等的试纸
详情介绍：
2-戊烯腈检测管193 2-Pentenenitrile
2-Pentenenitrile No.193
CH3CH2CH:CHCN
| Performance |
MeasuringRange | 0.5 to 6.0 ppm | 6.0 to 15 ppm |
Number of Pump Strokes | 4 | 2 |
Correction Factor | 1 | 2.5 |
SamplingTime | 3 minutes per pumpstroke | |
DetectingLimit | 0.1 ppm(n=4) | |
ColorChange | Yellow→ Red | |
ReactionPrinciple | CH3CH2CH:CHCN + Cr6+ + H2SO4 → HCN 2HCN+HgCl2 → 2HCl+ Hg(CN)2 HCl+Base 仺 Chloride. | |
| Coefficient of Variation | 10% (for 0.5 to 2 ppm), 5% (for 2 to 6 ppm) | |
| Shelf Life | 3 Years | |
| Corrections for temperature & humidity | Temperaturecorrection is necessary | |
| Store the tubes at cool and darkplace. | ||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Hydrogenchloride | - | No effect | Nodiscoloration |
Hydrogencyanide | - | No effect | Nodiscoloration |
Nitriles( | - | Plus error | Discolor redstain |
Acetonecyanohidrin | - | Plus error | Discolors redstain |
Alcohols, Esters,Ketones | 20 ppm orhigher | Minus error | Nodiscoloration |
Aromatichydrocarbons | 20 ppm orhigher | Minus error | Nodiscoloration |
C3)Note: Humidity scrubber removes humidity and acid gases.
| Othersubstance measurable with this detector tube |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | - | - |