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Katalog Alat Sampling dan Monitoring

Solusi lengkap alat monitoring lingkungan untuk udara, air, dan emisi dengan akurasi tinggi dan dukungan teknis profesional.
Passive Samplers UMEx 100 for Formaldehyde

Passive Samplers UMEx 100 for Formaldehyde

The convenient UMEx 100 Passive Sampler features sensitive method-validated chemistry for detection of low levels of formaldehyde. The single-use UMEx 100 contains a tape treated with 2,4-dinitrophenylhydrazine (DNPH) for reliable collection. Sampling rates are validated from 15 minutes to 24 hours or 7 days. Analysis is performed by high-performance liquid chromatography (HPLC).

Performance Profile

Sampling Rate for Formaldehyde
 28.6 ml/min with a RSD 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 daysSee the More Information tab for UMEx 100 sampling rates for other aldehydes.
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 mos from date of manufacture at < 39.2 F ([4 C])
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: < 39.2 F ([4 C])
After use: < 39.2 F ([4 C]) and analyze within 3 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 5 to 100 cm/sec
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)
Note: If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers for field study information.
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