| Phosphine | PH3 | NO.7LA | |
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| Performance |
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Measuring Range |
0.05 to 0.1 ppm |
0.1 to 1.5 ppm |
1.5 to 2.5 ppm |
2.5 to 9.8 ppm |
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Pump Strokes |
10 |
5 |
3 |
1 |
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Correction Factor |
1/2 |
1 |
1.7 |
6.5 |
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Sampling Time |
1.5 minutes per pump stroke |
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Detecting Limit |
0.02 ppm (n = 10) |
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Color Change |
Yellow |
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Reaction Principle |
Phosphine reacts with mercuric chloride to produce |
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| Coefficient of Variation | 10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.5 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity |
Unnecessary | |||
| Store the tubes at cool and dark place. | ||||
| Possible coexisting substances and their interferences | (NOTE) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Arsine |
1/10 time |
Plus error |
Produces red stain |
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Hydrogen chloride |
- |
No effect |
No discoloration |
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Diborane |
- |
No effect |
No discoloration |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.3ppm | 1ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Red