Indicator: 10 ~ 100 mg/m3
Measuring Range: 10 ~ 100 mg/m3, Number of Pump Strokes 2
Sampling Time: 3 minute per pump stroke
Colour Change: Yellow → Reddish brown
Reaction Principle:
+ HOCH2CH2OH + Oxidiser → 2HCHO
+ 3HCHO + (NH2OH)3H3PO4 → H3PO4
+ H3PO4 + Base → Phosphate
Coefficient of Variation: 15% (for 10 to 20 mg/m3),10% (for 20 to 100 mg/m3)
Nr. of tests: 5
Pump: GV-100S/110S
Detail
Performance
| Measuring Range | 10 to 100 mg/m3 |
| Number of Pump Strokes | 2 |
| Correction Factor | 1 |
| Sampling Time | 3 minutes per pump stroke |
| Detecting Limit | 2 mg/m3 (n=2) |
| Colour Change | Yellow → Reddish brown |
| Reaction Principle | HOCH2CH2OH + Oxidiser → 2HCHO 3HCHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate |
| Coefficient of Variation | 15% (for 10 to 20 mg/m3),10% (for 20 to 100 mg/m3) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Temperature correction is necessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Aldehydes, Ketones, Acid gases | + | Reddish brown | |
| Tetrahydrothiophene, tert-Butyl mercaptan | + | Reddish brown( 1mg/m3) |
| Calibration gas generation | Vaper pressure method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | C 100 mg/m3(H)(2014) | 3.2 to 33% |
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