Indicator: 1~20ppm
Measuring Range: 1~20ppm
Sampling Time: 2 minutes per pump stroke
Colour Change: Yellow → Brown
Reaction Principle: 3CH3CHO + (NH2OH)3H3PO4 → H3PO4, H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (for 1 to 6 ppm), 5% (for 6 to 20 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual tube
Manual
Performance
| Measuring Range |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.2 ppm (n=1) |
| Colour Change |
Yellow → Brown |
| Reaction Principle |
3CH3CHO + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
10% (for 1 to 6 ppm), 5% (for 6 to 20 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| |
Possible coexisting substances and their interferences (NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Ammonia |
 30 ppm |
No |
No |
| Acetic acid |
 2 times |
+ |
Brown |
| Acids |
|
+ |
Brown |
| Aldehydes |
|
+ |
Brown |
| Ketones |
|
+ |
Brown |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 25 ppm |
4 to 60% |
