四氯乙烯檢測管133HA Tetrachloroethylene 33HA
Cl2C:CCl2
Performance |
Measuring Range | 7to 20ppm | 20to 300ppm | 300to 900ppm |
Number of PumpStrokes | 2 | 1 | 1/2 |
Correction Factor | 1/3 | 1 | 3 |
Sampling Time | 45 seconds per pumpstroke | ||
Detecting Limit | 0.5 ppm (n=2) | ||
Color Change | Yellow → Reddishpurple | ||
Reaction Principle | Cl2C:CCl2 + PbO2 + H2SO4 → HCl | ||
Coefficient ofVariation | 10% (for 20 to 100ppm), 5% (for 100 to 300 ppm) | ||
ShelfLife | 2Years | ||
Correctionsfor temperature & humidity | Temperature correction is necessary | ||
Store the tubes in the refrigerator to keep at10oC (50oF) orbelow. |
Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Chlorine,Bromine, | - | Plus error | Produce reddishpurple |
1,1,1-Trichloroethane | 3000 ppm | Plus error | Produce reddishpurple stain |
Trichloroethylene | - | Plus error | Produce reddishpurple |
Unsaturated Halogenated HCs | - | Plus error | Produce reddishpurple |
Othersubstance measurable with this detector tube |
Calibration gasgeneration | Diffusion tubemethod |
TLV-TWA | TLV-STEL | Explosive range |
25ppm | 100ppm | - |