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Vinyl chloride No.131L
CH2:CHCl
| Performance |
MeasuringRange | 0.1 to 0.2 ppm | 0.2 to 3.0 ppm | 3.0 to 6.6 ppm |
Number of Pump Strokes | 4 | 2 | 1 |
CorrectionFactor | 1/2 | 1 | 2.2 |
SamplingTime | 1.5 minutes per pumpstroke | ||
DetectingLimit | 0.02 ppm (n=4) | ||
ColorChange | Yellow → Reddishbrown | ||
ReactionPrinciple | CH2:CHCl + Cr6+ + H2SO4 → HCl | ||
| Coefficient ofVariation | 10% (for0.2 to 1 ppm), 5% (for 1 to 4 ppm) | ||
| ShelfLife | 2Years | ||
| Correctionsfor temperature & humidity | Temperature correction is necessary | ||
| Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Ethylene | 200 ppm | Minus error | Nodiscoloration |
Tetrachloroethylene | 1/3 conc. | Plus error | Produce reddishbrown |
Trichloroethylene | 1/5 conc. | Plus error | Produce reddishbrown |
Benzene,Toluene | 200 ppm | Minus error | Nodiscoloration |
| Othersubstance measurable with this detector tube |
Substance | Correction Factor | Pump Strokes | Measuring Range |
Allylchloride | Factor: 16 | 2 | 3.2 to 48 ppm |
1,1,2,2-Tetrachloroethane | Factor: 10 | 2 | 2 to 30ppm |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 1ppm | 500ppm | 3.6 to 23% |