Indicator: 0.1~2.0ppm
Measuring Range:
+ 0.02 to 0.05 ppm, Number of Pump Strokes 5
+ 0.05 to 2 ppm, Number of Pump Strokes 2
+ , Number of Pump Strokes 1
Sampling Time: 1 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: B2H6 + 6HgCl2 → 2B2(HgCl)3 + 6HCl, HCl + Base → chloride
Coefficient of Variation: 10% (for 0.05 to 0.4 ppm), 5% (for 0.4 to 2 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.02 to 0.05 ppm |
0.05 to 2 ppm |
2 to 5 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.01 ppm (n=5) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
Diborane reacts with mercuric chloride to produce hydrogen chloride.
HCl react with indicator to discolour to red.
B2H6 + 6HgCl2 → 2B2(HgCl)3 + 6HCl
HCl + Base → chloride |
| Coefficient of Variation |
10% (for 0.05 to 0.4 ppm), 5% (for 0.4 to 2 ppm) |
| Shelf Life |
2 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 colour by itself to |
| Arsine |
1/10 time |
+ |
Red |
| Hydrogen selenide |
1/10 time |
+ |
Red |
| Phosphine |
1/10 time |
+ |
Red |
| Hydrogen chloride |
1/3 time |
+ |
Red |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 0.1 ppm (2014) |
- |
|
