UMEx 100 Formaldehyde Passive Sampler
Formaldehyde Passive Sampler: UMEx 100
The UMEx 100 Passive Sampler for formaldehyde was developed in collaboration with the National Institute of Working Life in Umea, Sweden. Constructed of tough polypropylene, the UMEx 100 contains a tape impregnated with 2,4-dinitrophenylhydrazine (DNPH) for reliable collection of formaldehyde.
Specifications
| Sampling Rate for Formaldehyde |
28.6 ml/min with a RSD of 18% (for 15-min to 8-hrs or 24-hrs See the Passive Sampling Guide for UMEx 100 sampling rates for other aldehydes. |
| Detection Principle | Formation of stable DNPH (2,4 dinitrophenylhydrazine) in the presence of formaldehyde |
| Concentration Range | 5 ppb to 5 ppm |
| Lower Detection Limits | 15-min: 200 ppb (0.24 mg/m3) 8-hrs: 5 ppb (0.006 mg/m3) 24-hrs 2 ppb (0.002 mg/m3) 7 days 0.2 ppb (0.0002 mg/m3) |
| Shelf-life | 12-mo from date of manufacture at < 39.2F (4C) |
| Capacity | 29 µg/sample |
| Analysis | Desorption of hydrazine and analysis by high-performance liquid chromatography (HPLC) with UV detection |
| Accuracy | ± 25%, exceeds OSHA requirements |
| Storage | Before use: < 39.2 F (4C) After use: < 39.2 F (4C) and analyze within three weeks Do not store with food. |
| Temperature Effects | No effect on sampling rate between 10 and 30 C |
| Humidity Effects | No effect from 10 to 80% relative humidity (RH) Do not use sampler below 10% RH. |
| Wind Effects | No effect from 0.05 to 1.0 m/s good correlation at 0.02 m/s |
| Interferences | Large amounts of carbonyl compounds may reduce the uptake of formaldehyde. Use in ozone levels < 0.5 ppm. |
| Dimensions | 3.4 x 1.1 x .35 in (8.6 x 2.8 x .89 cm) |
| Weight | 0.38 oz (10.8 gm) |
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