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UME^x 100 Passive Samplers

The UME^x 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 UME^x 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 UME^x 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
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

* Sampling periods between 24 hours and 7 days have not been evaluated
Note: If sampling in an atmosphere where Formalin is the source of Formaldehyde, please read the Technical Note under Documentation

Specifications

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)

Sampling Rates for Other Aldehydes

Compound		Sampling Rate (ml/min)
Acetaldehyde		22.8‡
Benzaldehyde		13.5‡
Butyraldehyde		15.8‡
Crotonaldehyde		9.71‡
Glutaraldehyde		14‡
Hexanaldehyde		9.66‡
Isovaleraldehyde		15.5‡
Propionaldehyde		14‡
Chloroacetaldehyde		19.4**
Decylaldehyde		10.4**
Heptanaldehyde		12.8**
Nonanaldehyde		11.6**
o-Phthalaldehyde		12.83**
o-Tolualdehyde		12.7**
Valeraldehyde		15.4**

‡ Partial Validation
** Calculated Sampling Rate

UME^x 100 Passive Samplers

Description	Pack Size	Part Number
UME^x 100 Passive Sampler for Formaldehyde† # and other Aldehydes. Designed for single use only. DO NOT reuse UME^x samplers.	10 25	500-100 500-100A
Treated Tape, for QC (quality control) purposes only	50	P20084

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

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