Formaldehyde Detection Tubes (0.1 to 40 ppm)
Measures Formaldehyde with a Range of 0.1 to 40 ppm.
- Measuring Range:
- 0.1 to 5 ppm - 5 Pump Strokes
Correction Factor: 1
- 5 to 40 ppm - 1 Pump Stroke
Correction Factor: 8
- Sampling Time: 1.5 minutes per pump stroke
- Detecting Limit: 0.05 ppm (5 pump strokes)
- Changes from Yellow to Reddish Brown
- Corrections for temperature & humidity: Temperature correction is necessary
- Relative Standard Deviation: 10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 5 ppm)
- 3 Year Shelf Life
- Reaction Principle:
- 3HCHO + (NH2OH)3H3PO4 → H3PO4
- H3PO4 + Base → Phosphate
- Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences:
| Substance |
Interference |
Changes color by itself to |
| Aldehydes, Ketones |
+ |
Reddish brown |
| Acid gases |
+ |
Red |
| Organic acids |
No |
No |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No. of Pump Strokes: |
Measuring Range: |
| Benzaldehyde |
by scale |
1 |
4 to 92 ppm |
| Cyclohexanone |
by scale |
1/2 |
10 to 470 ppm |
| Diisobutyl ketone |
5.8 |
4 |
0.58 to 29 ppm |
| Methaldehyde |
0.65 |
3 |
0.065 to 3.25 ppm |
| Propionaldehyde |
7.6 |
1 |
0.76 to 38 ppm |
Formaldehyde Detection Tubes (0.1 to 40 ppm)
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