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UMEX 100 Passive Sampler for Formaldehyde
Meets OSHA Method 1007 Specifications

 
UMEx 100 passive sampler with callouts
UMEX Downloads

  • Accurate and reliable for formaldehyde collection
    • Sample integrity is assured
    • Accuracy exceeds OSHA standards
    • Uses popular 2,4-DNPH chemistry
    • Validated by OSHA and Swedish Institute

  • Economical and easy to use
    • No pump or training required
    • Low-cost sampler
    • Sample medium and blank/correction in one unit

  • Documented uptake rates
    • For 15-minute to 24-hour samples
    • For 7-day samples

  • Conforms to EU ISO 16000-4-2004

  • 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

  • Safe
    • No glass or chemical liquids in the sampler

  • Samples ppb levels of formaldehyde

  • 28.6 ml/min uptake rate enhances sensitivity for 15-minute, 8-hour, and 24-hour sampling

  • Versatile sampler
    • Workplace sampling from 15 minutes to 12 hours
    • Long-term indoor air sampling with validated rates for 24-hours to 7-day samples
If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers (PDF) for field study information.

UMEX 100 Passive Sampler for Formaldehyde — The Professional's No. 1 Choice.
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 aluminized 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.

Using the UMEX 100 Passive Sampler
Sampling with the UMEX 100 Passive Sampler for formaldehyde is easy and requires no pump or training. Simply remove the sampler from the pouch, record sampling information, and slide the cover to the "on" position. Clip the sampler on a worker for personal sampling up to 12 hours or in an appropriate location for area sampling from 24 hours to 7 days. When sampling is complete, simply slide the cover to the "off" position, place the sampler back in the pouch immediately, and seal. Send the sampler to an accredited laboratory for analysis by high-performance liquid chromatography. The UMEX 100 sampler is designed for single use only. Do not reuse UMEX samplers.



UMEX 100 for Other Aldehydes
UMEX 100 can be used to sample other aldehydes. See the Passive Sampling Guide for UMEX 100 sampling rates for other aldehydes or check below for calculated sampling rates.

Compound
Sampling Rate
(ml/min)
Acetaldehyde
23.1
Benzaldehyde
14.1
Butyraldehyde
16.5
Crotonaldehyde
9.71
Glutaraldehyde
14.3
Hexanaldehyde

9.66

Isovaleraldehyde  

15.5

Propionaldehyde
14.0
Partial validation; see the Passive Sampling Guide

UMEX 200 for Sulfur Dioxide and/or Nitrogen Dioxide
UMEX 200 uses tape treated with triethanolamine (TEA) for the passive collection and analysis of sulfur dioxide and/or nitrogen dioxide. Analysis is by ion chromatography (IC) with conductivity detection. See UMEX 200 for Sulfur Dioxide and/or Nitrogen Dioxide for more information.

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 days

See the Passive Sampling Guide 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 freezer temperatures (< 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: freezer temperatures (< 39.2 F ([4 C])
After use: freezer temperatures (< 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.

 

UMEX Downloads

UMEX 100 Research Report (PDF)

UMEX 100 Operating Instructions (PDF)

UMEX 100 Spec. Sheet (PDF)

Validation of UMEX 100 Samplers for Crotonaldehyde (PDF)

Validation of UMEx 100 Samplers for Hexanaldehyde (PDF)

Validation of UMEx 100 Samplers for Isovaleraldehyde (PDF)

Validation of UMEx 100 Samplers for Propionaldehyde (PDF)

Tech. Note: Sampling Formaldehyde from Formalin Using Passive Samplers (PDF)

UMEX 100 Español Folleto

EPA IP-6 Method Update: Determination of Formaldehyde and Other Aldehydes in Indoor Air (PDF)

List of Laboratories for Analyzing 500-100 UMEX 100 Passive Samplers

For a listing of Parameters for Laboratory Analysis, see the Certificate of Analysis for 500-100 UMEX Samplers.

Ordering Information      

Description Qty. Cat. No.

UMEX 100 Passive Sampler for Formaldehyde and other Aldehydes, individually packaged in aluminized pouch

Designed for single use only. Do not reuse UMEX samplers.
Limited shelf-life; storage required at freezer temperatures (< 39.2 F ([4 C]). Do not store with food.
10 500-100
25 500-100A
Stand for Indoor Sampling 1 690-302
Treated Tape, for QC purposes only pk/50 P20084
. If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers for field study information.

References

Levin, J.O. and Lindahl, R., "Diffusive Air Sampling of Reactive Compounds - A Review," Analyst, Vol. 119, January 1994, pp. 79-83

Levin, J.O., Lindahl, R., and Andersson, K., "Monitoring of Parts-per-billion Levels of Formaldehyde using a Diffusive Sampler," APCA Journal, Vol. 39, No. 1, January 1989, pp. 44-47

Levin, J.O., Lindahl, R., Andersson, K., and Hallgren, C., "High-Performance Liquid Chromatography Determination of Diethylamine in Air Using Diffusive Sampling Thiourea Formation," Chemosphere, Vol.18, Nos. 11-12, pp. 2121-2129

Levin, J., Lindahl, R., and Andersson, K., "High-performance Liquid Chromatographic Determination of Formaldehyde in Air in the ppb and ppm Range Using Diffusive Sampling and Hydrazone Formation," National Institute of Occupational Health, Research Department in Umea, Analytical Chemistry Division, P.B. 6104, S-90006 Umea, Sweden Environmental Technical Letter 9, 1988, pp. 1423-1430

Levin, J.O., Lindahl, R., and Andersson, K., "A Passive Sampler for Formaldehyde in Air Using 2, 4-Dinitrophenylhydrazine-coated Glass Fiber Filters," Environmental Science & Technology, Vol 20, No. 12, 1986, pp. 1273-1276

Levin, J.O., Lindahl, R., Heeremans, C., and van Oosten, K., "Certification of Reference Materials Related to the Monitoring of Aldehydes in Air by Derivatization with 2,4-Dinitrophenylhydrazine," Analyst, Vol. 121, September 1996, pp. 1273-278

Lindahl, R., Levin, J.O., "Laboratory Validation of a Diffusive Sampler for the Determination of Glutaraldehyde in Air," Journal of Chromatography A, 710, 1995, pp. 175-180

Lindahl, R., Levin, J.O., and Jarvholm, B., "Self-assessment as a Method for Determination of Exposure to Formaldehyde," Indoor Air, Vol. 4, 1999, pp. 453-458

Lindahl, R., Levin, J.O., and Martensson, M., "Validation of a Diffusive Sampler for the Determination of Acetaldehyde in Air," Analyst, Vol. 121, September 1996, pp. 1177-1181

Pengelly, I., Groves, J. A., Levin, J.O., Lindahl, R., "An Investigation into the Differences in Composition of Formaldehyde Atmospheres Generated from Different Source Material and the Consequences for Diffusive Sampling," Applied Occupational Hygiene Vol. 40, No. 5, 1996, pp. 555-567

OSHA Method 1007 Formaldehyde (Diffusive Samplers), May 2005

Note:UMEX was developed in collaboration with:
Jan O. Levin
Arbetslivsinstitutet
National Institute for Working Life
Umea, Sweden

This page was last modified August 18, 2014
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