Chloroform Detection Tubes (0.3 to 4.5 ppm)
Gastec Detection Tube No. 137LL measures Chloroform with a Range of 0.3-4.5 ppm.
- Measuring Range: 0.3 to 4.5 ppm
- Number of Pump Strokes: 4
- Correction Factor: 1
- Sampling Time: 2 minutes per pump stroke
- Detecting Limit: 0.2 ppm (4 pump strokes)
- Changes from White to Pale Purple
- Corrections for temperature & humidity: Temperature correction is necessary
- Relative Standard Deviation: 10% (for 0.3 to 1.5 ppm), 5% (for 1.5 to 4.5 ppm)
- 1 Year Shelf Life (in the refrigerator)
- Reaction Principle:
- CHCl3 + I2O5 + H2S2O7 → Cl2
- Cl2 + 3,3'-Dimethylnaphthidine → Reaction product
- Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
- Comes in a Box of 5 pre tubes and 5 detector tubes
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Chlorine |
≧ 6 ppm |
+ |
Pale purple |
| Bromine |
≦ 4.5 ppm |
No |
No |
| Iodine |
≦ 4.5 ppm |
No |
No |
| 1,1,1-Trichloroethane |
|
+ |
Pale Purple |
| Trichloroethylene |
|
+ |
Pale purple |
Chloroform Detection Tubes (0.3 to 4.5 ppm)
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