| 1,1,1-Trichloroethane | CH3CCl3 | NO.135 | |
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| Performance |
|
Measuring Range |
100 to 500 ppm |
500 to 2000 ppm |
|
Number of Pump Stroke |
1 |
1/2 |
|
Correction Factor |
1 |
4 |
|
Sampling Time |
3 minutes per pump stroke |
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Detecting Limit |
50 ppm (n=1) |
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|
Color Change |
White |
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Reaction Formula |
Methyl chloroform reacts with oxidizing agent to produce intermediate products then it react with detecting agent to produce reddish orange stain. |
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| Coefficient of Variation | 10% (for 100 to 200 ppm), 5% (for 200 to 500 ppm) | |
| 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 |
|
Chlorine, Bromine, Iodine |
- |
Plus error |
Discolor reddish orange stain |
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Chloroform, Dichloromethane |
- |
Plus error |
Discolor reddish orange stain |
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Carbon tetrachroride |
- |
None |
No effect |
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Methyl bromide |
- |
Plus error |
Discolor reddish orange stain |
|
Trichloroethylene, Tetrachloroethylene |
- |
Plus error |
Discolor reddish orange stain |
| Other substance measurable with this detector tube |
|
Substance |
Correction |
No. of pump strokes |
Measuring range |
|
Chlorobromomethane |
Factor: 0.22 |
1 |
22 to 110 ppm |
|
1,1-Dichloroethane |
Factor: 0.9 |
1 |
90 to 4500 ppm |
|
1,2-Dichloroethane |
Factor : 4.0 |
1 |
400 to 2000 ppm |
1,1,2-Trichloroethane
|
Tube 135 Reading (n=2) |
100 |
200 |
300 |
400 |
500 |
|
1,1,2-Trichloroethane (ppm) |
220 |
350 |
480 |
610 |
750 |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 350ppm | 450ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Reddish orange