| Butyl acetate | CH3CO2(CH2)3CH3 (CH3CO2C4H9) |
NO.142 | |
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| Performance |
|
Measuring Range |
0.05 to 0.8% |
|
Number of Pump Strokes |
2 |
|
Correction Factor |
1 |
|
Sampling Time |
1.5 minutes per pump stroke |
|
Detecting Limit |
0.002% (n=2) |
|
Color Change |
Orange |
|
Reaction Principle |
CH3CO2(CH2)3CH3 + Cr6+ H2SO4 |
| Coefficient of Variation | 15% (for 0.01 to 0.2 %), 10% (for 0.2 to 0.8 %) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes at cool and dark place. | |
| Possible coexisting substances and their interferences | (NOTE) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Sulfur dioxide |
500 ppm |
Plus error |
Discolors green |
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Hydrogen sulfide |
500 ppm |
Plus error |
Discolors dark green |
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Alcohols, Esters, Ketones |
- |
Plus error |
Discolors dark green |
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Propane |
2000 ppm |
Plus error |
Dark green (Whole layer) |
|
Aromatic HCs |
500 ppm |
Plus error |
Discolors Greenish brown |
| Calibration gas generation | Static gas dilution method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 150ppm | 200ppm | 1.7 to 7.6% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Greenish Brown
Cr3+