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UMEX100 Passive Sampler CH2O

Meets OSHA Method 1007 specifications and conforms to EU ISO 16000-4-2004 with highly selective 2,4-DNPH chemistry for easy analysis

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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 single-use UMEx 100 contains a tape treated with 2,4-dinitrophenylhydrazine (DNPH) for reliable collection of formaldehyde. Samplers are provided in individual aluminiumised pouches that can be used to transport the sampler to a laboratory after sampling.

For convenience and quality control assurance against contamination, each sampler incorporates a “blank/correction” section in addition to the active sampling section so there is no need to send extra samplers to the laboratory.

The shelf-life date is printed on a label on the outside of each pouch for easy inventory management. The UMEx 100 Sampler includes a clip for attachment to a worker’s collar for personal sampling or in an appropriate location for area sampling.

  • Accurate and reliable for formaldehyde collection
  • Accuracy exceeds OSHA standards
  • Uses popular 2,4-DNPH chemistry
  • Validated by OSHA and Swedish Institute
  • Economical low cost sampler
  • Easy to use – no pump or training required
  • Sample medium and blank/correction in one unit
  • Conforms to EU ISO 16000-4-2004
  • Documented uptake rates
    • For 15 minute to 24 hour samples
    • For 7 day samples*
  • Meets specifications of OSHA Method 1007†  
  • Referenced in EPA IP-6C
  • Highly sensitive and specific analysis method
  • Small and unobtrusive
  • Simple-to-use “on/off” sliding cover
  • Low 2 ppb limit of detection
  • Accurate and reliable for formaldehyde collection
  • Accuracy exceeds OSHA standards
  • Uses popular 2,4-DNPH chemistry
  • Validated by OSHA and Swedish Institute
  • Economical low cost sampler
  • Easy to use – no pump or training required
  • Sample medium and blank/correction in one unit
  • Conforms to EU ISO 16000-4-2004
  • Documented uptake rates
    • For 15 minute to 24 hour samples
    • For 7 day samples*
  • Meets specifications of OSHA Method 1007†  
  • Referenced in EPA IP-6C
  • Highly sensitive and specific analysis method
  • Small and unobtrusive
  • Simple-to-use “on/off” sliding cover
  • Low 2 ppb limit of detection
  • Safe – No glass or chemical liquids in the sampler
  • 28.6 ml/min uptake rate enhances sensitivity for 15 minute, 8 hour, and 24 hour sampling*  
  • Versatile sampler – suitable for both workplace sampling and long term indoor air sampling

Specifications

Sampling Rate28.6 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-life12 months from date of manufacture at < 4°C (39.2°F)
Capacity 29 µg/sample
AnalysisSolvent extraction and analysis by HPLC (high-performance liquid chromatography) with UV detection
Accuracy ± 25%, exceeds OSHA requirements
StorageBefore 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
InterferencesLarge amounts of carbonyl compounds may reduce the uptake of formaldehyde Use in ozone levels <0.5 ppm
Dimensions8.6 x 2.8 x 0.89 cm
Weight10.8 g

Sampling Rates for Other Aldehydes

CompoundSampling Rate (mL/min)
Acetaldehyde22.8 ‡
Benzaldehyde13.5 ‡
Butyraldehyde15.8 ‡
Crotonaldehyde9.71 ‡
Glutaraldehyde14 ‡
Hexanaldehyde 9.66 ‡
Isovaleraldehyde15.5 ‡
Propionaldehyde 14 ‡
Chloroacetaldehyde19.4 **
Decylaldehyde 10.4 **
Heptanaldehyde12.8 **
Nonanaldehyde 11.6 **
o-Phthaldehyde12.83 **
o-Tolualdehyde12.7 **
Valeraldehyde15.4 **

‡  Partial Validation
** Calculated Sampling Rate

UMEx 100 Passive Samplers

DescriptionPack Size Part Number
UMEx 100 Passive Sampler for Formaldehyde † # and other Aldehydes.
Designed for single use only. DO NOT reuse UMEx samplers.		10500-100
UMEx 100 Passive Sampler for Formaldehyde † # and other Aldehydes.
Designed for single use only. DO NOT reuse UMEx samplers.		25500-100A
Treated Tape, for QC (quality control) purposes only50P20084

† If sampling in an atmosphere where Formalin is the source of Formaldehyde, please contact us.
# Limited shelf-life; storage required at <4°C. Do not store with food.

Accessories

DescriptionPart Number
Stand for Indoor Sampling690-302UMEX100 Passive Sampler CH2O
Shelter for Outdoor Sampling690-303 UMEX100 Passive Sampler CH2O