UMEX100 PASSIVE SAMPLER FOR FORMALDEHYDE

Sampling Rate 28.6 ml/min with a RSD (Relative Standard Deviation) of 7.6% at wind velocity of 5 to 100 cm/sec for 15 minutes to 24 hours
20.4 ml/min at wind velocities < 5 cm/sec for 1 to 7 days
Detection Principle Formation of stable DNPH-hydrazone in the presence of formaldehyde
Validation Range 0.06 to 3.0 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 months from date of manufacture at < 4°C (39.2°F)
Capacity 29 µg/sample
Analysis Solvent extraction and analysis by HPLC (high-performance liquid chromatography) with UV detection
Accuracy ± 25%, exceeds OSHA requirements
Storage Before use: < 4°C (39.2°F)
After use: < 4°C (39.2°F) and analyze within 3 weeks.
Do not store with food.
Temperature Effects No effect on sampling rate between 10 and 30°C
Wind Effects No effect from 5 to 100 cm/s
Interferences Large amounts of carbonyl compounds may reduce the uptake of formaldehyde
Use in ozone levels <0.5 ppm
Dimensions 8.6 x 2.8 x 0.89 cm (3.4 x 1.1 x 0.35 inches)
Weight 10.8 g (0.38 oz)